Chapel Perilous has taken its toll on me and indeed, my cosmic trigger finger is broken. For readers not familiar with Chapel Perilous I will give Robert Anton Wilson's definition of that god forsaken place. In researching occult conspiracies, one eventually faces a crossroad of mythic proportions (called Chapel Perilous in the trade).
Keep wood chisels razor sharp for building cabinet doors. A good set of chisels helps clean up and fine tune mortises and tenons or remove a bit of wood anywhere you need to, such as the ends of panel grooves in door frames. A chisel set and mallet are essential woodworking tools.
1 Close the door first, and then nail them on both sides and at the top. Use an existing door for reference if needed. If you don't have a nail gun, you can use a hammer to nail the frame to the wall.  Wear safety glasses when working with power tools.