5S for addressing ones clutter.

I recently rediscovered the 5s Process which originates in Japan as part of Kaizen. It seems to be a nice complementary technique / conceptualisation for addressing ones clutter - sometimes a term does the trick:

SEIRI: create tidyness. Throw away all unused stuff, file away the rest.
SEITON: keep evertything at the right place. Keep the tools you need accessible, hide materials you don't need regularly.
SEISO: keep your (work-)space clean, remove all traces from the previous task before starting the next.
SEIKETSU: develop a personal sense for organizing your things. Develop routines, optimize your system according to your needs.
SHITSUKE: stay disciplined doing the above, make it a habit and permanent practice.