MASSIVE tip.
Invest in some decent He's drill bits. I've got some Dewalt ones that drill locks like butter. If you use cheap crappy ones they'll make the job near impossible, are liable to break and cause injury and generally make a pigs ear of the job.
ALWAYS wear protective eye wear as well. If a drill bit lets go, they can cause serious eye trauma. Pacman832013-11-23 15:19:58