Bill
I have more than one project on the go at any time and swap between them. Like XD351 I box every thing when I stop on a project. I also like to loosely assemble as much as possible.
I feel that keeping a diary of the work done and taking photographs is invaluable. In the olden days this meant having a note book and a few pictures. Now, with computers, one uses a spread sheet and can take thousands of photographs for nothing. My simple spread sheet has a few columns; Date, Part, Part number, Action, Comment and Photograph file name. This is a daily record of work and tries to record everything particularly minor disasters, required tools etc.
JA