For whatever reason, I find this to be particularly hard to do.
I feel like I'm not doing anything wrong, but I'm not getting any positive results from what I have been doing. If I apply somewhere, I'll pester them infrequently, as I'm not really sure how much pestering is too much, and if they haven't been hiring for a while, then I'll move on. If somewhere is hiring, however, I'll apply, pester them until I get an interview (rarely does this happen) and then call and say 'Thanks for the interview, just checking to see where you are on hiring etc.'
Are there any techniques you have used just to get a basic job? Do you know what works, and what doesn't?