Electronic cigarettes have been around for less than ten years, which means there is simply no way to know their long-term effects. This newness is part of the reason why they are still not regulated by many government agencies around the world, including the Food and Drug Administration (FDA) in the U.S. In short, there is often no way to know for sure what is in your e-cigarette, and what exactly the materials that are in it may do to you. Assuming that your e-cigarette contains what it is supposed to, it is probably safer overall than a traditional cigarette. That is to say, if you were going to spend your life smoking either only e-cigarettes or only traditional cigarettes, the e-cigarettes would likely be the better choice. However, there is no real way to know for sure yet, and most people who do smoke e-cigarettes don't completely eschew traditional cigarettes anyway. Although they come in a wide range of shapes and sizes, practically all e-cigarettes work by using a battery-powered heat source to vaporize an "e-liquid," which typically contains nicotine and flavorings (among many other things). You breathe in and puff out this vapor in much the same way as you smoke a traditional cigarette. Extra care needs to be taken with the e-liquid, especially if there are children around. The liquid provides a far more concentrated dose of nicotine and other compounds that the vaporized mist, and increasing calls to poison control hotlines indicate that consuming the e-liquid in non-vapor form can cause a host of medical problems, and can present serious risks to children. Proponents of e-cigarettes point out that they remove the "smoke" part from smoking. Traditional tobacco smoke contains a host of toxins and carcinogens, created in part by the burning process. This lack of smoke probably makes e-cigarettes overall less damaging to your health than traditional cigarettes, but they are far from risk-free. Traditional cigarettes bring nicotine and a host of other chemical compounds to the table; e-cigarettes are primarily nicotine delivery systems. Nicotine itself is not recognized as a carcinogen, meaning e-cigarettes are probably less likely to cause ailments like lung cancer. However, nicotine can cause direct damage to heart cells, making heart attacks and other cardiovascular problems more likely. Therefore, switching from traditional to electronic cigarettes may simply be a case of trading one bad habit for another. Some people want to make the switch to supposedly healthier e-cigarettes long-term, while others want to use it as a bridge to stopping any and all types of smoking. While there is ample anecdotal evidence and some research indicating that e-cigarettes can improve your odds of quitting altogether, there is precious little clear, research-supported evidence that e-cigarettes are an effective method for quitting. Part of the problem is that it is not so simple for many people to switch completely from traditional to electronic cigarettes. Indeed, as of 2013, some three-fourths of e-cigarette users also regularly smoked traditional cigarettes as well. For many people, e-cigarettes simply become another part of the smoking repertoire, one that is often more acceptable in public places.
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One-sentence summary -- Recognize the uncertainty surrounding e-cigarettes. Know how e-cigarettes work. Weigh the pros and cons vis-a-vis traditional cigarettes. Don't assume they will automatically help you quit smoking.

If you've ever created a free email account, or you have an email account through your internet service provider, you can check your email using your web browser. Open the website that you use to log into the email account. For example, if you have a Gmail account, visit mail.google.com, or if you have Comcast internet visit comcast.net and click the Email button. You will need to log in with the account you have with that service. If you don't have an account, you can create one from a variety of free email services. When you log into your email account, you will be taken to your inbox. This is where all of your new email messages appear. Double-click a message in your inbox to open it. Click the "Reply" button to send a response to an email you have received. The Reply function varies from service to service. Some services such as Gmail allow you to start typing your reply in the same screen as the original message, while other services require you to click the "Reply" button or link to compose your message. Spam email is primarily advertising and scam email messages. Most email services have spam filters which automatically detect and remove spam before it reaches your inbox. These messages are moved to the Spam folder, where they typically sit for 30 days before being deleted. Check the folder occasionally, as sometimes legitimate mail gets flagged and sent to the Spam folder. If you don't take the time to manage your inbox, you will soon be drowning emails. After you read an email and apply to an email, either sort it into a folder or delete it from your inbox. This will help keep you organized. See this guide for details on organizing your Gmail inbox. Email is one of the most popular ways to try to scam and "phish" (trick people into giving out personal information). Any email offer you read that sounds too good to be true most likely is. Never click links unless you trust the sender, and even then its best to be cautious, as viruses on the sender's computer can cause them to send infected emails without knowing.
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One-sentence summary --
Log into your email provider's website. Find an email to open. Reply to a message. Check your "Spam" folder occasionally. Delete or sort read messages. Don't click any unknown links.