If you buy clean, fresh, name brand fuel you do not need to do anything outside of regular mainteance items like filters and so on.
A good tip is to buy your fuel at truck stops. They will not risk losing thier business with big fuel users to skimp on the product they sell. They will moniter thier tanks for water and contamination and they sell enough fuel to always have fresh product for you.
The hit and miss guy on the corner can't offer you all of this.
If you are going to store your truck for extended period or just not drive much then you should treat the fuel with a stabilizer. It will keep the fuel fresh longer and add some extra lubrication for the injection system.