Originally Posted by LowCel
Put some grease on your skewers and see if that helps any. I tried for weeks, if not months to find a squeek once. Come to find out it was my front skewer.

I had this one.
<creak, creak>
Grease and tighten crank bolts.
<creak, creak>
Check pedals (they're fine)
<creak, creak>
Tighten seat post collar.
<creak, creak>
Grease and tighten seat clamp (at the rails)
<creak, creak>
Grease and tighten bar clamp and stem.
<creak, creak>
Remove back wheel, clean dropouts and skewer faces.
<crickets>
That might not be it for the OP, but that's a good list.