[Cory]

Are you using large or small bits? crank the speed way down for a large one (This applies for any sort of drilling, regardless of material) Use tons of coolant, and try to use bits that arent pieces of junk. I think Titanium oxide (Nitride? I know it's titanium something) coated drill bits last much longer and drill better than regular bits. make sure you dont go so slow that you're just letting material get packed into the bit, as you'll dull it quickly, but make sure you arent drilling so fast that it dulls the bit, or snaps it.

Cory

[edit] Dont try to drill any large diameter holes with a hand drill. If the bit gets caught, you could jerk your arm pretty badly, and it sure wouldnt feel good for a few days.