Try to complete as many sets as you can as they count towards your Season Score and will increase the level of rewards you receive in next year's version of Madden NFL Mobile. Remember that your Team OVR counts for 25% of your Season Score so always look to upgrade your lowest-rated players. Not all the sets can be completed whenever, there are some sets like the NFL Gameplan which are timed sets and need to be completed within a certain amount of time.