If the target frequency is a long way from the starting frequency, including a rest or two is advantageous. A rest is when a ramp pauses or " rests” at a given frequency. This allows the brain to catch up to the ramp or reinforce brainwaves in a given band. I try to include rests at notable frequencies that have shown to be significant in BWE.

You must first be in an alpha state to obtain a theta state. To get into the delta, you must first be in theta.