A few thoughts

Rule 1 is to use a mechanically-guided drillmotor whenever possible. Something as simple as a drill guide (a block of metal with a correctly-sized hole drill-pressed through) clamped to the work so that the hole in the block is in line with the should-be hole in the work makes the job MUCH easier.

Other thoughts include using a countersink to champher the stripped-out hole before drilling, grinding the drill to put a sharper point on it, rounding the sharp corners where the drill point intersects the margins (the OD of the drill) while being sure to maintain clearance behind the cutting edge, and "dubbing" the drill by stoning or grinding small flats on the cutting edges (where the flute surface intersects the point) to reduce the hook.

John