always, always, always.. sometimes even just taking the car out the drive i put my seatbelt on lol (force of habit, and a good one at that)....
For the inconvenience of of stratching your arm and 'clicking' a seatbelt into place, it's a small price to pay if you're ever in a crash!
My mum never wore a seatbelt and always leaned forward as not to crease her shirt

and to top that she has 9 points for speeding lmao, not a good combination.
Buckle up lads!