Sourcing sound effects for projects can often be a very difficult thing to do, involving spending a lot of time on google downloading what amounts to cheap, free clip art for sound effects.
If you're lucky enough to have a kind of benefactor, you might get a quality set of sound effects CDs to use on your projects and if you're lucky enough, you'll get time to copy some of them for use later . . .
Otherwise, life as a low budget sound designer can be difficult. However, I recently came across a website by Stephan Schutze, Sound Library. Out of the kindness of his heart, he's put together over 14,000 sounds he's recorded or created over the years and he's letting us use them free. I did a few sample searches based on two of the projects I'm working on right now and they came up with good possibilities . . . so it seems to be a very comprehensive set of sounds.
It's sure to come in handy.