Might I suggest a couple of bricks of .22 LR, accompanied by both a pistol and rifle? Lotsa shots, on the cheap.
Shotguns are fantasticly fun, also. Especially if you have some clays to shoot at. Just don't think about it too much.
Shoot handguns, too. Big ones. (and little ones, too.)
Basicly, if you can legally lay hands on it, don't pass on an opportunity to shoot it
Shoot some reactive targets. From water bottles to tannerite.
Shoot steel. Big fun. (BOOM*ping*BOOM*ping*BOOM*ping*)
Stay safe, and don't keep the company of unsafe individuals. No matter how professional they try to make you think they are.
"Don't worry, I'm a professional,"
"Don't worry, the safety's on,"
"Don't worry, I know what I'm doing,"
"Don't worry, it's not loaded,"
Any one of the above statements is a pretty good cue for you to start worrying. And if you're worried, you should also be moving on. Especially if firearms are involved.
Of course, you probably knew a bunch of that already. But it never hurts to repeat it