We pull this tip out every Spring because that is the time of year we are getting ready to start using our decks again. To avoid potential accidents you should be performing a quick check to make sure that your deck areas are still serviceable and safe for your family.
Check that they are securely attached to the house and are level. Check that the support posts under the decks are plumb. Over the winter months the wood and supporting beams may have deteriorated. Check for rotten boards and replace as required. It is not uncommon to need to re-level your decks in the spring.
In order to prolong the life of the wood, wash the deck to remove any mold or mildew, and apply water repellents or semi-transparent deck stain.