I never wear several of these products: primers, blush, bronzer, lipliner, brow pencil, and glitter, so yeah I could give up any of those! lol
If I had to give up a product that I actually do wear, it would be lipstick or lipgloss ... I don't really like the feel of stuff on my lips and don't wear it every day as it is!
Gotta have the foundation, concealor, and powder to hide my shiny, acne-prone skin though!