I have been playing bass for about half a year and can slap and pop with some confidence. My slap technique consists of simply striking the side of a given string with the fleshy part of my thumb. Nothing real fancy. I have been told that if I want to be able to double thump, and perform other "higher level" slap techniques that I need to learn to use my thumb as a pick. What I mean here is, the slap is a downward motion where my thumb strikes a string and rests on the string below it. The person that told me this told me it would be easier for me to learn to double thump this way, because I can hit the same string on the upstroke. I am trying to learn to do this, so I have been trying to incorporate the new style into my playing. However, I catch myself going back to the old way unconsciously. If any of you slappers out there could give me some guidance I would appreciate it. Is slapping in the downward motion through the string a better technique to use? In your opinion, should I focus on practicing this technique until my hands do it without thinking, or do you think the old way of doing things will work? I am leaning towards learning the new way. When I perform that thump properly, I like the way is sounds and I feel that it will be an important step in helping me reach my goals. What do you guys think?