Decks are very common and in many cases are used to enter the second story of a home. This makes decks and stairs a big safety issue.
Deck maintenance is vital to longevity. Deck surfaces should be stained yearly if they are natural wood. Keep the snow off to help avoid rotting.
If you have an older deck, have it inspected to make sure it is safe. If you are thinking about putting a hot tub on your deck, make sure it is structurally able to hold the additional weight.