Your and You're is my favorite screw-up of mine.

Nice list. "Effect" can be a verb, however, when meaning "to produce" or "bring about." For example, "The decision effected a change in her lifestyle."

Nice to see someone still cares!

At the top of my list would be loose vs lose. I see professional writers (and presumably their editors) using "loose" (not tight) when they really mean "lose" (not in their possession).