If you simply need to bring your deck up to speed, there are 3 simple things that can be done to repair your deck or even enhance the deck.
First, make sure your footings are solid as this is the foundation that keeps your deck upright and level. This can be achieved by using a level and then figuring out which of the footings are out of level. You would then dig around the footing and expose it. Make sure it is properly dug to the correct depth per the code in our area and reinforced with concrete.
Secondly, most deck issues are with the hand rail and deck boards as they are exposed to the sun. If the boards are not rotten, take a palm sander, smooth out the splinters then come back and clean and seal the deck boards.
Finally, you may have simple cupping or deck boards lifting off of the joists. Take a screw gun and make sure you hit the floor joist solidly to get a good grip on it.
If you need assistance or want to see great deck examples, go to charlotte.archadeck.com