Dug North has a nice write up and review of the Kreg pocket hole joinery system, he writes –
Are you inclined to make things yourself from wood, but are short on the skills required for complex wood joints? Are you an accomplished woodworker who just wants a faster way to make a variety of clean joints?
You’ve got to look into pocket hole joinery. The idea is simple: a jig and special drill bit allow you to drill an angled hole that both pre-drills the wood pieces and provides a recess for the screw head. Special pan-head screws hold the wood pieces together. This technique can be used to make a wide variety of wood joints — even face frames.
Kreg is the leading brand and they offer systems from $50 to $140 — all are highly rated. I bought the $50 version and now wish I had the case that comes with the $75 version. Note: you need screws of the right length to match your project.