Try an exercise called elevator slides as a great way to warm up your voice and reduce vocal cord injury. Make a noise that sounds like a long, slow siren while making an "ah" sound. Start out as low as you can go, ascend to as high as you can, and go back down. Repeat this several times, experimenting with different vowel sounds, such as "ee" and "ooh." Keep your throat relaxed, especially as you get to the high notes, to help the notes not catch in your throat. Fill your lungs with air just like you normally would, except keep going to allow your lungs to really expand. Try to inhale through your nose, and take your time to get a good solid breath. Try not to make any sound when breathing in. Inhaling slowly will help you avoid making a sound. If you can hear yourself taking your breath in, there is tension in your breath. This tension will be audible in your out-breath while you're singing. To find out where your diaphragm is, put your hands firmly around your waist and cough. The muscle that pushed your hands out is your diaphragm. When you take a deep breath, your diaphragm expands; it should stay expanded throughout the duration of the phrase you're singing until it's time to draw a new breath in. Try keeping your hands around your waist when you're starting out, to be sure that you're supporting your voice with your diaphragm. Soprano is the highest range of the female voice. To see if you fall into this range, play a middle C on a piano or keyboard and match the note with your voice. Do the same thing for all notes up to the C two octaves above middle C. Coloratura sopranos, a subset of the soprano category, are actually able to sing the third F above middle C and sometimes higher. If you are unable to strongly hit the highest C, you may be a mezzo-soprano. Mezzo-soprano is the mid-range female voice. They are often supporting or villainous roles in operas, though some French operas have lead role mezzos. Use a piano or keyboard to try and match the mezzo notes to determine if this is your voice range. Contralto is the lowest female voice range, and countertenor is the highest male range; these ranges consist of almost the exact same notes. The only difference is that countertenors generally cannot hit the lowest F, so that range actually starts from the G below middle C and goes up an octave to F. True contralto voices are so rare that contralto roles are often given to mezzo sopranos. Countertenors often use a falsetto, or head voice, technique to reach their high notes. If you're a female with a low voice, or a male with a high voice, you may fall into these voice ranges. Use a piano or keyboard and try to match the notes to find out. Tenors usually have the male lead roles in opera. Like the other voice ranges, there are subset categories within the tenor range that are more particular for different types of roles. Lyric tenors are able to easily hit the highest notes in the range, and generally get roles of charming young men, whereas dramatic tenors generally are most comfortable in the middle of the range and get robust, muscular characters for roles. This is the mid-range male voice. Play the notes on a piano or keyboard and try to sing along with them to see if this is your range. Baritone roles are often comic or villainous in nature. Bass voices, the lowest of the male range, often get older, comic, or supporting roles in operas. If you're a male and have a pretty low singing voice, try to match the low notes on a piano or keyboard to find out if this is your range.
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One-sentence summary -- Warm up your voice. Take a slow, deep breath in. Keep your diaphragm expanded to support your voice throughout each note. Sing from middle C and up two octaves to see if you have a soprano voice. Try the G below middle C and up two octaves to A for a mezzo-soprano voice. Sing the F below middle C to the F one octave above it for contralto and countertenor voices. Try the C below middle C to the C above it to see if you have a tenor voice. Sing the second G below middle C to the G above it if you have a baritone voice. Try the E above middle C to the E two octaves below if you have a bass voice.

You should both seek help from a licensed therapist who is trained in marital therapy and can help you both work through the infidelity. A good marriage counselor can help you put the affair into perspective, identify any factors that may have contributed to the affair and teach you both how to rebuild your relationship. Your marriage counselor may also give you reading material to study and discuss together at home as you both work towards saving your marriage. It's important that you show your spouse you are willing to try to make the marriage work by committing to weekly counseling sessions and reading any material given to you by the counselor. You may feel that you would like to go to a therapist on your own to work on your issues, especially if you are the spouse who had the affair. Though couples counseling is very beneficial for you and your spouse, going to a therapist on your own can show your spouse that you are willing to also focus on your own issues so they do not hinder the progress you are both making in couples counseling. You may want to consider going to a therapist on your own if you think some of your personal issues may have caused the affair or lead to developing feelings for someone other than your spouse. Working through your issues can help you to better support your spouse as you work together on your marriage. Look for a couples support group in your area that focuses on saving a marriage after infidelity. It can be useful to share your experiences with others who are also going through the same issues and problems as you. The support group is usually lead by a certified marriage counselor, who will moderate the support group and help to facilitate discussion between you, your spouse, and other couples.
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One-sentence summary -- Go together to a marriage counselor. See a therapist on your own, if necessary. Join a couples support group.

You should be able to see yourself all at once in any mirror you use in your home. This doesn't necessarily mean you need to have a home full of full-length mirrors, but you should avoid tiny mirrors, or mirrors made up of individual tiles. You should be able to see your head and shoulders in the mirror at the same time. You should avoid selecting mirrors with distorted surfaces. This also applies to mirrors with antiquated surfaces. It's believed that looking into such mirrors will make you feel distorted yourself, and this is bad for your home's feng shui. Try to avoid using round or oval shaped mirrors in your home. Square or rectangular mirrors are generally thought to be best for creating good feng shui. You shouldn't hang any mirrors in your home that are broken or cracked. If a mirror that's already in your house breaks, take it down immediately.
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One-sentence summary --
Use whole mirrors. Don't use mirrors with distorted surfaces. Use square or rectangular mirrors. Avoid broken mirrors.