I see you're from the Pittsburgh area... what streams do you usually head out to? If you stay local, then here's my recomendations.
Caddis - Elk and CDC, wets, pupa, cased. Lots of caddis in most streams in the area.
Junk flies - SJW, green weenie, egg.
Terrestrials for summer - ants (dry and wet), beetles, grasshoppers, crickets, inchworms.
Tie up some sulphurs and rusty spinners in a few different sizes (12-18). There's a lot of flies that will look that color that come off of most streams. It might not be exact but you'll be pretty close.
A few other dries would be adams (size 12-18), and griffiths gnat (size 20-24). Adams can cover just about anything, and griffiths gnat covers the small stuff.
You can get more exact as you go along on your fly fishing career, but that's a good start.
2 more months to go before the ice will break free and the fishing will start to get good.
Ryan