The first step for the Patriots will be to review the season, which is already underway.
The Patriots coaching staff hands off a list of items for players to correct and work on in their offseason. Call it homework.
Belichick will handle his own homework. Surely when he looks at the film, he'll see a team that both drastically improved over the course of the season in core areas (offensive line) and floundered in others (secondary). The Patriots saw an uptick in quality of play on both sides of the ball, but will also see the same enduring issues that have plagued the team pop up on film: Communication in the secondary, lack of a pass rush, and an unwillingness to stick with the running game.
Upon further review, they'll see an inability to stretch the field at wide receiver and susceptibility to big plays in man-to-man coverage at linebacker and cornerback.