Hi!...Best way to go about choosing your foundation is to first assess your skin...decide if your skin is oily/dry/combination...if you have oily skin, you will select a "matte" formula foundation, if you have dry skin, opt for a "dewy" or products like a "tinted moisturizer", combination skins can usually choose any formula depending on the look they want to achieve...again, dewy for glowing skin and matte for more coverage. Next you will need to get the PERFECT foundation shade...and this is the most important step...ideally, you would like to look at a swipe of foundation against your cheek/jaw area in natural light...I suggest you select a colour close to your skin tone, then select one shade lighter and one shade deeper than the selected shade and compare all three colours on your face at one time to see which colour blends and "disappears" against your skin tone...this will be the ideal shade...If your department store does not allow for testing in natural light, simply ask the salesperson to provide you with a sample of their foundations (preferably in 2 shades) that you can test at home (most if not all make up counters will offer this!...so you can try the foundation and get 1 week's worth of a sample to try!)...so once you have selected the type of foundation and colour.......it all comes down to application!....Application is key...you need to start off with a clean face, followed with a moisturizer and then followed by a primer (primer is not always necessary, but is a must if you want/need your foundation to last a long time and look its best)...now that you have "prepped your face", you can choose to apply your foundation with a non-latex wedge sponge, your clean fingers or a foundation brush (my personal favourite app. method!)...start off by using very little and build coverage as you go...as they say less is more....once you have applied your foundation...you have the perfect canvas to work with your makeup!! ........and voila!