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Know your skin. Pay attention to what you look like when you're flushed. Purchase a primer. Purchase a concealer. Buy a good foundation. Buy a highlighting product. Get a bronzer. Buy some brushes (optional).
Exactly what you'll need to achieve a healthy glow will depend on the quality of your skin: If your skin is already quite clear, you may prefer to use a BB cream or tinted moisturizer, which are lighter than a foundation. If you have heavy acne, you may want to opt for a dual concealer that contains both green and skin-tone hues, as green can help neutralize the red of your pimples; in addition, you'll definitely want to use foundation. Knowing the natural colors of your skin when it's flushed (i.e. red/pink) will help you choose which blushes and lip colors to use for a natural glow. To find out what you look like when you're flushed, jump up and down or run around for a few minutes until you feel a bit out of breath; your cheeks and lips should look darker than normal. This is the color you want to aim for in your blush and lipstick. A good primer will minimize fine lines and pores, and leave your skin feeling velvety smooth. It will also help your makeup stay put. There are different types of primer, so choose one that matches your skin type -- for example, for oilier skin, you'll want to use a gel primer. You can purchase a good primer at most stores that carry makeup. Aim for a store that carries a lot of makeup; that way you can experiment with different options to see which primer works best for you. If you already have clear skin, you needn't use a concealer. If you have any dark spots, under-eye circles, or pimples, a concealer can help you cover them up. Choose a concealer that matches your skin as closely as possible. It may take some experimentation on your own skin to find the concealer that's right for you. The ideal shade of foundation for you will be one that disappears into your skin. If you have young, healthy-looking skin, you can either skip the foundation all together, or try a tinted moisturizer or BB cream. Tinted moisturizers and BB creams are much lighter than foundations. These provide sheer coverage, giving you a more natural look. Look for foundation, BB creams, and/or tinted moisturizers with an SPF included. Highlighters come in liquids, creams, and powders, and are great for adding a little glow to your skin. Some makeup artists recommend avoiding highlighters with silvery or champagne tones, as these can make your skin look frosty instead, seek golden tones. If your skin is mature, avoid using powders as they will sink into and highlight any fine lines or enlarged pores. Liquid highlighters are a safer choice. Choose a translucent bronzer that will give your skin a bit of a glow without looking unnatural. Avoid bronzers that are too sparkly or too matte. To choose the right shade for you, hold the bronzer up to your face as you look in a mirror. The bronzer should only be one or two shades darker than your skin tone. Sun-kissed is the look you're going for. It's possible to apply makeup with your fingers and any applicators that come with your makeup; however, proper makeup brushes can help you achieve more professional-looking results. Most drugstores and beauty supply shops will carry a variety of brushes and basic sets. These will vary greatly in price. A good-quality brush will have strong bristles that do not fall out. It will also have a strong ferrule, which connects the bristles to the brush handle. Key brushes for glowing skin: concealer, foundation, powder, blush, bronzer, and shadow.