Like the title says, where do I start with knowing what make up, particularly foundation, powder and concealer that I need to use for my skin type? I look at friends and co workers and their make up is fab but I can never get it right, I just don't know where to start. I need someone to actually tell me what to buy. I have good skin, it's dry in parts and I'm light skinned, not totally pale but light. Any suggestions? Oh and I have terrible under eye bags so need a good concealer for that. And I'm 40 if that makes a difference.