I use primarily paper for organizing and primarily computer for doing my work.

My paper system is partly based on GTD and partly on Martin Ternouth's
paper-based project management system as described here:
(scroll down to the second post by Ternouth)
http://www.edwardtufte.com/bboard/q-...?msg_id=00008c

I also use my powers-of-2 system for looking at things after
various numbers of days. I added a "zero folder" (should properly
be labelled "one-half", but "zero" sounds more impressive)
to be looked through twice a day. People with faster work could
add folders to be looked through 4, 8, 16 etc times per day.
I store some empty plastic inboxes in my office to put on my
desk for keeping organized at times of extremely urgent work.