Before buying new foundation there are two areas of concern that need to be addressed.
Firstly, the foundation must complement your skin type.

Oily Skin; For oily skin that is prone to shine, an oil-free formulation will hinder the production of excess oil, and most contain extra powder particles to dry any oil produced.

Normal Skin; Normal skin can take pretty much any formulation, but a liquid will give ample coverage without looking caked or heavy. Dry skin needs make-up foundation with extra moisturisers to keep it supple, and to prevent the skin from drinking in the makeup. A cream make-up formulation will last longer and also hydrate.
Foundation Colours
The best time to pick a colour is when your skin is at its most natural shade. So, after your holidays or morning after self tanning applications are not the best time. The best place to try make-up is on the jaw line.
Basically, foundation colour falls into two categories;
• Foundation bases with yellow tones
• Foundation bases with pick tones
The most common yellow-toned skin types are Asian, sallow and black skin, whereas fair skin has generally has pink tones. It is important to choose a foundation that matches your skin's base, otherwise the make-up will not blend well, no matter how you apply it.
Applying make-up foundations
Oily Skin; With oily skin, the application of oil-free formulas needs to be fast, as they dry speedily. Using clean fingers to apply small does to the areas most in need of coverage is the best way; simply do each area at a time until the face is complete.

Normal Skin; For normal skin, the choice of cream-to-powder liquid or powder foundation can change how much time you spend applying it. Cream-to-powder is best applied with a sponge, starting in the centre of the face and working outwards; its done in a matter of moments. Liquid foundation looks more natural applied with a foundation brush. Again work the brush outwards, taking care to use less around the eye area. Powder or mineral make-up foundation should be applied with a large powder brush; while it will not give the same level of coverage as a liquid, it is a great makeup for those who are pressed for time.

Dry Skin; For dry skin, cream foundation moves well around the face, and a little goes a long way. Dry skin tends to have few blemishes, so concentrate on areas that need coverage, and leave clear areas bare: this is why getting the right colour match is vital

makeup, whatever it is, begins with the right tools. Thats basically what differentiates you from a makeup artist in the first place. When applying foundation, depending on the type, i use a wedge sponge or foundation brush. The basic idea behind the foundation, as its name implies is to set a foundation, like your canvas for the rest of the face painting job you wann achieve. So once the foundation is not set right, the whole job doesnt make sense anymore.

It's goota be the shade of your own skin tone.
Your skin has to be in good condition, else foundation aint gonna sit right on you.
If you don't know what shade to use,try applying foundation on the side of your face, along your jaw line, here's exactly where your skin tone is true. If fondation blends in and doesnt come off your facial skin so obviously, then its right for you.