rook is right. find a director. any local college is full of aspiring film makers that need soundtracks. also familiarize yourself with the soundtracking technology, learn recording, smpte timecodes, digital work, all that. at the early stages of working with very indie's you and the director wont have a budget to speak of. so the more you can do, the more desireable youll be. same goes for instrumentation. at least get some midi knowledge.
ive done a couple and thats how it worked. i had the gear, knew how to use it, and could work in a wide variety of styles and on a variety of instruments.
[size=-2]and i dont think i capatalized once in there. oh well. we all know im a jerk that way. i have a firm grasp on the concept, just opt for the alternate. at least ive started capitalizing proper names

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what he said...
and if you're really serious, you could always move to where there's rising film communities.
LA is the mecca, but NYC is a great little burdgeoning community with Tisch at NYU, springing directors by the truckloads, and hipster haven, Williamsburg, out in Bk, housing them all.
i've already done a few under my belt as a guitarist for alot of student films, and lemme tell ya, its hard! music as "wallpaper" is difficult, especially when we were all ingrained to really emote at each performance.
but its still cool to see a director properly and artfully put together the visual and musical aspects of the medium, where you can experience your music literally give life to a scene! its a unique satisfaction/sensation i've never felt in any other of my music outlets.