Many people think that repairing their decks is something they cannot do right now. It may be that sometimes you can't, but if your deck is still in proper shape and by fair I mean not falling down then you should be able to deal with it if you learn some things.
You have to look at a deck that is starting to sag, not too appealing to mention that it is also an accident waiting to happen. You can find the best decks and ramps from the various online sources.
Leaving it there will only make things worse and if you wait too long you are sorry because it will cost you more and you may need some professional help.
Keeping a deck in top shape is a lot easier and cheaper than trying to fix one and most decks start collapsing. It will last a lifetime if you take the time to maintain them regularly.
Wooden decks are the first to show their age and anytime you want to redo someone, you have to look at the situation to find out if it is beyond hope and it is better to start from scratch.
Gray, warped, or slightly broken boards are salvageable and can be reinstalled. With a little time and some manual labor, you can quickly make them look like new. Start with going to your deck and look for nails that are starting to pop out.