I used to start with the bottom end, and then work up.
Now I try not to work any regular method.
After reading much Eno methodology and stockhausen, xanakis, I try to start with something I wouldn`t normally each time.
Methodology breeds repetition and stagnation.

I would advise anyone to shake things up now and again.

Start with the hats, leave the kick till last, or start with a Pad.
Don`t even make techno, make something else completely then at the last stage mould what you have into a techno framework.