My pal Ilona just moved and said on Twitter, "now to the unpacking. not my strong suit. anyone want to place a bet on how many boxes will remain untouched a year from now? :-/"
This one's for you, awesome lady.
I'd bet that more of those boxes will hang around than the closet space would be worth to you in the meantime, so chip away at them faster and reap that reward sooner.
Give yourself until Valentine's Day to settle in. Then after that, every other week, turn up the music and for the duration of four upbeat songs, open a box or drawer and paw through it, seeking items which can go into active use, or (more likely) your charity box, recycling, or trash.
Odds are if you didn't dig it out before this foray, you neither love it nor use it and it can move on to someone who does.
Just four songs. You can do this easy-peasy.