Depending on what your interest in theater is, I always recommend working on plays. It's a great way to be introduced to the field, and also a great way to be seen by agents and representation. I'm also a great advocate for studying acting at a drama school or a college.
Not to toot our own horn, but when 'The Sopranos' was on, it was as good as any movie that was coming out in the theater. I think that goes for a lot of shows today.
I have somewhere met with the epitaph on a charitable man which has pleased me very much. I cannot recollect the words, but here is the sense of it: 'What I spent I lost; what I possessed is left to others; what I gave away remains with me.'