I assume we are talking about full tang knives. The three basic ways would be pins, cutlery rivets (friction hold), and screw-type rivets. Screw-type rivets hold best and mosaic pins generally look best. If you look in one of the knife supply catalogs you will see many different variations of the three types mentioned above.
Most any pin or rivet will hold just fine if the handle is assembled correctly with a good grade of epoxy.