Suggestions?

Ok, so I am pretty decent at graphic design and have created a few nice headers for websites etc...
However, I have always had a hard time finding good images to use in my work. So all of you guys that are freaking amazing at this, where do you get your images? I usually try to find stuff off of websites, google image search, etc... but that hasn't been yielding many results for me lately. Any tips would be much appreciated. I also understand if you don't wanna share your secrets.

Just tell me what your looking for and maybe i can stear you in the right direction

Well, that's the problem. I reallly never know until I sit down to start working on one, and then I really can't ever find anything good.