You basically just take it easy for a while before the sub begins to not feel as tense when you push down on it when it is not playing. Some people go as far as suggesting misting water on it but.... idk bout that. Its like a new car, dont floor it before you're warmed it up and "broken it in".
A break in period allows the spider to loosen up. Supposedly if you don't do a break in for some subs, the spider will tear or w/e. Never had that problem.
u can go easy for a week and just dont play crazy low notes all day. u can free air the sub for a few 10 min or so. i just wire up everything and go no more then 60% on my deck and i try to play no more then 10 min at a time.