Just to add:

Clip the ground cable to the muffler.. always a good ground point.

MAGS OFF!!!! Double check that, just a little bump on a ungrounded mag could kill you.

Don't fill to the top of the neck, stop about a fingernail before or else you will for sure learn about how those pumps don't shut off right away and always overfill about a liter.

Don't forget to test your fuel, let it sit for a few minutes. I once had over a gallon of water from a 24 hour pump! Smell is a good key, dip your finger in it also and it should turn white from the LL in the gas.

and.... PLEASE don't ever try to unchock a running airplane LIKE I ONCE DID! I got it stopped, but had to break a leg doing it. LOL

(Yeah, call me stupid - but in the scenario I thought it would work if I was lightning quick. Got stuck trying to jump my chocks after I forgot about them. A cessna at idle power, WILL move out with some authority all on it's own.... it is a hella funny story all on it's own. I learned a LOT that day, to include my lesson on don't go flying with a broken leg.)