I've spent most of the morning checking in changes to my application here at work. I've found a pretty good process that helps me makes sure that the comments that go into CVS represent what has changed in the code.

• Use CVL to identify changed files.
• Open the file in FileMerge to see the differences between versions.
• I have an OmniOutliner document for tracking change notes.
• I go through the diff in FileMerge, and put my comments in the outline under the filename.
• When done, I paste the comments from OmniOutliner into the comments field when checking in the code.