Something just occurred to me, batwister. Maybe what you need to do is actually shoot a lot more film. Seriously, go nuts. Instead of shoot one, take it to the lab, get the results, and do it one by one, go and buy 25 rolls or more of film, and then spend a whole weekend photographing stuff.
I had personally noticed in my fridge a couple of bricks of Agfa, which was expired. Since I had been shooting sheet film, I decided to embark on a use-it-up campaign. I took my Holga, since I don't care about it, and bicycled up and down alleys, photographing stuff. Just using up the film, roll after roll. And what happened? I got a lot of good shots! Sure, some didn't turn out. It's a Holga. But a lot of them did! And really, the real fact of the matter is that many things are a numbers game. You have to keep making the shots.
Also, I just realized that you are going to a lab. Can you process B&W film at home? I use my bathroom, and I've done so for years. Then the cost comes down to time and chemicals.