Finding a job is like finding a relationship, you can't really look for one, it sort of finds you.
If you recall how you met your wife or husband, it wasn't because you were looking to meet your future mate, was it? You probably weren't looking for someone to date either. I used to say "stop looking and you'll probably find what you are looking for".
There is such a thing a "trying too hard". Appearing desperate is not attractive, follow this link to find out how to overcome the negative stigma.
Back to the relationship analogy, finding a job is just like dating. On iVillage there was a post about the 15 steps to finding a boyfriend and every single one of them applies to a job seeker.
1. Be realistic
Know what you are looking for. And remember, it isn't about the money.
2. Be a hot mama, not a prospective mama
Don't talk about a job too early in the process of networking, that is like talking about what you want to name your children on the first date. Be attractive first.