I have 3 badges that I've qualified for but need to get: Veteran knife, Veteran engineer, and Basic/Veteran Explosives Ordinance. Vet knife is probably the easiest out of those three.

I need to play a wee bit more to qualify for the next few:

1) Distingushed Service Ribbon [command time]
2) Legion of Merit Ribbon [about 15h play time]
3) Vet anti-tank [3 1/2 h]
4) Vet sniper [many h]

Those would all be good to get. I just need to forget I have exams next week so that I can play guilt-free!