Scrapbooking is a good idea and for no money you can do some digital scrapbooking.
Oh if only I had the time there are a thousand things I would do lol. On my list;
Sort out photo's into albumns (and get more printed) in the right order.
I am still in the process of making french memo boards but as I only work on them when the kids are asleep after my 101 chores they are still not finished but look something like this
this - I bought fabric but you could use whatever you have, ribbon, buttons, and I am using off cuts of plywood as my backboard and hobbie-fill sheets of foam underneath - but those aren't necesary - I just like the slightly padded look. I am also doing one in an old picture frame.
I also have a couple pieces of furniture I have bought off trademe that I want to sand back and repaint with a distressed/white wash look. I think I will take time off work for those though!
You can make things like play dough which takes up a little time.
Also look on the Martha Stewart website for heaps of simple craft projects