If the water isn't draining away quickly, make sure there are no kinks in the hose.
Don't overload the drum. Check the manufacturer's instructions to find out the weight your machine is designed to take.
After use, wipe the detergent drawer and door seal with a dry cloth to prevent damp and bad odours.
Finally, don't forget to check the pockets of your washing for loose change. Coins can easily fall into the drum of the machine and jam the spinning motion.