A 3 ring binder is perfect. I like to have it hands on. Some do it right on their PC.
I like to include a picture of the pattern
2" sq samples of the fabric I am using. I sew them right onto a piece of paper and then right down the selvage info next to each fabric. This is not an absolute rule. If it is a scrap, it's a scrap.
As I progress I include the type of thread I use if I know. And the techniques involved too.
Who it is for or enter in shows, even local guild shows.
If I get paid for a quilt.
Add some progressive pictures and one of the label.
I also like to add daily thoughts and insights, jokes and adventures.
peace