Vilo:

Registrations Banks are (to me) the best way to manage your keyboard and be VERY quick in changing from one to another different set of registrations.
Like Gary said, just put a name to each one of the banks you are making, I use either "generic" registrations like "Rhumba1 108" that tells me that is for any rhumba at 108bpm, and in each of the registrations I make my own combinations, 8 in total, of course, all of them different, and what I do, is the first 1-4 registration, in with one Rhumba style and from 5-8 I use a different Rhumba style at the same tempo, so, If I want to change in the middle of the song, I can do it without the risk of "jumping" in tempo, this is an example, I use that for ALL kinds of music.
Also I have dedicated registrations for certain tunes, mainly, the "song styles".
I hope you can use some of the ideas.

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mdorantes