If you are fortunate, your parents are living and you have a good relationship with them. The dreaded day will come, though, when they die. It will be hard to deal with, no matter what advice you get, but this piece of advice will certainly help: Things I Wish I Had Known When My Mother Died :: YummyMummyClub.ca.
I would add: expect to deal with a lot of administrative tasks that will seem surreal at times. There is much more of it then you think. At best it will seem bizarre. At worst, it will be agony. Either way, it must get done, and if you don’t think you will be able to do it, consider who you would lean on to help you with it when the time comes.
(Thanks to Emma W for the pointer to this.)