For the typical American IPA / IIPA:
2-3 weeks in primary for fermentation and conditioning at 63-65 F-ish. Increase temp. to 66-68 F after first week and a half. Let condition. When nearing the end of your 2-3 weeks, add 3-4 day loose pellet dryhop in primary.
After first dryhopping stage, rack to secondary atop a fresh set of bagged & weighted pellet dryhops. Wait another 3-4 days.
Cold Crash 1 day. Pitch gelatin solution when the beer is in the mid 30s.
Continue with the Cold Crash for another 2-3 days before bottling.
If kegging, add another short stage of bagged dryhops in the keg.
Weigh the bag down with sanitized marbles and secure bag to top of keg with fishing line.