don't laugh but
The Logo Creator
is one of the best purchases I have ever made. I have been doing graphic design professionally for 25 years and whenever I'm stuck with a logo design I play with the Logo Creator until I have that epiphany of what the logo I'm working on should be. The funny thing is that I have used it for a few years now and I still haven't used an actual logo I created in the program. I guess I use it more for inspiration than anything else.
BTW, you don't have to buy all the logo packs they have. If you have the core program you can add your own graphic elements to it and create entirely new logos.
It's easy to use and inexpensive, give it some thought.