Even when using a split-point, punching your target is ideal for precise results later. For larger holes, it's always a good idea to start with a smaller pilot hole (an undersized bit or the finished hole size bit with a pilot tip). | 
I've got a number of drill bits that have shed their stamped sizes on the chuck end, so I keep this guide wire-tied to my drill press just for the occasion. | 
Along with regular cleaning, you can also reverse and swap the Drill Doctor's diamond cutting wheel with a Phillips screwdriver and the supplied key wrench. They claim the wheel is good for sharpening roughly 200 bits or so. |
Lubricating your bit while drilling not only makes it easier to cut through thicker metal, it's also good for keeping your bit's cutting edge sharp longer. | 
I've noticed fewer and fewer drill bit kits that feature "all" the pertinent info like this antique of mine does-even the expensive set I recently purchased only had the individual drill sizes. Whether on paper or stamped in metal, this is good info to have handy. | 
The act of drilling takes more than just a sharp bit. First off, avoid any possible bit "walking" by simply marking your spot with a snap or hand punch. You can get snap punches in cheaper plastic versions, but they won't outperform a good one like this. |
Like I said, drilling a hole is no art form-anybody can do it. But if you want to drill nice, accurate, clean holes, it'll take a little more than just tightening a bit in the chuck and having at it. | 
And speaking of handy things to have around, for those of you like me who've run a drill a "bit" too far, guide-stops like these are the perfect remedy for shallow situations and well worth every penny. | |