1) Never feel the pressure!
As someone else as said if you're not 100% sure you've secured the fuel cap or dipstick or whatever shut down and check - you may look stupid to all your passengers or students but it's way better than the alternative.
Also never let other aircraft put the pressure on to turn early or make a short field so they can get in a bit quicker. Making a rotten landing in a 207 while trying to drag it over the fence impresses no one, not even your passengers or the boss.
Great thread
Cheers