Projects Who make a good Project Build Log?

I am always concerned about having info organized and with me when I travel. I showed the source in a prior post, above. Here is a typical page:

Can't have too much info detail about your one-of-a-kind rod.

 

Considering that when I asked for some 3/8 fuel line the answer was what make, model etc, it is probably a good idea.
All I have done so far is throw all the reciepts in a drawer in a tool box that I know the better half will never think
to look in.

 

Was looking at my book from over 25 years ago. Kept some notes on the 5 W. Looks like I wrote in code! Hard to figure out my notes now