It is so much fun to read all of the responses!
If I had to name only two, they would be BB (I use Dior) and Korres lip balm. That said, I never leave the house without more. I am so pale (light skin, eyes, and hair) that I really feel naked without more. I use a physicians blend bronzer that is very light - I use it instead of blush because I have a ruddiness to my skin and it doesn't make sense to add red/pink to it. I use a brow tint and mascara too. It sounds like a lot, but I keep it to a natural look. I also love the Laura Mercier Caviar stick...so easy to use and it stays on all day.
I have had a few makeup applications at stores and I have to say that I have never been happy with what they do. Their job is to show off the "colors of the season" and they don't translate well for me. Be choosy and pick what is right for YOU.
Good luck and have fun with it!