HEy!
It all depends upon how creative you are!
Its a good thing that u already have jobs in hand...So be happy nd start..
I would advice tht you -->
1. sit with a pen /pencil paper and write down the points u need to be in the logo...liek wat ur cliet wants..the colro scheme..the usage...the purpose..where it wud be used..nd stuff liek tht..!
2. Start to sketch out smething rough....after a no of rough sketches u wud be with smething that u cn go digital with..
3.Get some good fonts which suit the req..(
www.dafont.com )
4. Chek out se galleries for inspiration liek deviantart.com get to the logo section..u wud get 100000s of ideas..then u can try logopond.com
5. You can upload concepts here nd ask for critics..
6. Google nythgin u want ...
All the best :P
Hope tht helped
ALi..