So here are a couple of articles, a plan and some jigs, to increase your accuracy with the drill press and belt and disk sander. The first is a nice plan from a pre-1930's PM Shop Notes, for a fine feed attachment for your drill press. The fine feed can't be beat for doing accurate drilling in the drill press. You can also do light milling work on your drill press with this attachment. The problem here is that without a draw bar, few import drill presses have spindles accurate enough to keep your chuck and tooling from dropping out and the spindles often have a sloppy fit and light bearings. Ok for their intended purpose, but even light milling can be a step to far.
The second article is a nice collection of quick jigs for doing accurate repeatable work on the disc and belt sander. The article is by R. J. Cristoforo and if you do woodwork, then you have probably come across some of his many books and articles on the subject. This article was published in the 1984 Popular Science Yearbook.