All above are good suggestions.
I'd start with the ensuring that the bottom bracket threads are properly treated (lubed or otherwise, according to the manufacturer's spec) and the bottom bracket is properly torqued. The next logical step after that is the pedals. If you have Look-style pedals, applying furniture polish to your cleats or even wiping the cleat contact surface on the pedal with furniture polish can help eliminate squeaks from pedals. Ensure the pedals are properly torqued and that their threads are lubed. If the squeak still persists lubing the quick release clamps where they contact the drop outs. Still there? Be sure to check lubing of threads and proper torquing of stewing stem clamp bolts and handlebar clamp bolts. If squeaks are still present, check the bolt torque and lubing on the saddle post clamp and likewise the seat rail clamp. It doesn't hurt to lube the contact surfaces of the seat rail clamps. Also be sure your chain is properly lubed.
Please note that too ensure proper torque, you have to loosen a bolt and then retighten it with a torque wrench. Checking torque without first loosing the bolt will quite often give inaccurate torque on the bolt.
Maybe I missed it, what kind of crank, bottom bracket, and pedals do you have?