If the Red Sox do intend on using the new found cash right away, I think they should use it for guys who are already in a Sox uniform. They could use it to extend the contracts of David Ortiz or John Lester. Ortiz could get a little more this year in exchange for signing for a low ball price for next season. With it they could throw in some sort of automatic one year extension that kicks in at the end of each season based on numbers and starts. After this year's "pay-day" contract, the rest of his extension years could also have some bonuses thrown in so he gets paid if he produces as he ages.
When it comes to Lesters' extension they could just use some of the extra cash as part of a signing bonus so maybe take a little bit off his future yearly salary.