Along with all the other suggestions ... you may want to consider including -
* costs of fabrics and supplies
* fees, if quilted by someone else
* batting
* thread used - brand, type, weight, colour #
* fabric samples
* photos of front, back and label
A lot of this is really dependent on how detailed you want your records to be.
I decided I would sooner have an old fashioned scrapbook style book, rather than a computer record.
It got started but I have not kept it up!
Perhaps a goal, to get back at it?