If you're new and too cheap to dive in and buy a torque wrench (I still don't have a torque wrench and I have a decent amount of carbon stuff), one of those "Y" handled 8-9-10mm socket and 4-5-6mm Allen key tools will keep you honest- just the general shape and size of the tool makes it pretty obvious when you're overtightening. You can't use them everywhere, the angles won't allow it, but use I'd advise to use them on as many bolts as you can get to.