I've made topics before about water electrolysis... never got around to actually doing said electrolysis though. But I've heard of alternative means of making hydrogen, such as mixing strong acids with metals. I'm guessing that would be more expensive and/or wasteful than electrolysis?

Electrolysis would be the best way to create Hydrogen. Prepare a very dilute solution of common salt in water add the solution to any non conducting vessel and dip two graphite electrodes connected to a 6V battery into the solution. I once tried electrolyzing water using iron electrodes, but i got a green precipitate below the anode, which turned brown after some time. Probably the chlorine ions reacted with the iron anode and formed FeCl2 which reacted with NaOH(Na+ and OH- ions in solution) and formed FeOH2 which got precipitated.Graphite electrodes are quite nonreactive so i bet they would work. The problem is about isolating Hydrogen because Hydrogen may burn again in the presence of O2 to form water again.

An oldie from my High School Days Kipp's Apparatus