Combatting the post-vacation blues

I just got home from a long-overdue, much-needed vacation that was so much fun and now I am deeeeeeepressed that it's over. The whole back to life/back to reality of it all feels pretty overwhelming. I know I should be happy I had a vacation in the first place, but I was looking forward to it for so long and now it's over.

Rather than booking another vacation ASAP (I can't afford it tbh) what else can I do to shake off these post-vacay blues? Anyone else experience this when they get home from a trip, too? Help!