Finally catalogued my mileage in a spreadsheet. I'm usually better at that with a new car but was careful to annotate my odo on the receipts. I'm averaging a fill up every 4-5 days and gas has went up almost a dollar.
Also annotated my major events (maintenance/repairs and yes, did note the CSC failure!) and plotting my first oil change. I was going to plot my washes but decided that would probably be kind of crazy. Plus can't remember the exact date of one of my washes. And then the dealer did a wash after the repair... and I had to spot clean some bird poo a couple days ago without a full wash.