Finishing work: No you're not done yet! Ya gotta set more deck screws into the framing, make sure you use a countersink on the screw holes if ya want to get fancy and have things look nice, fill the holes once completed with plastic wood, finish shimming all the side or top spots that need shims, make sure the locksets you installed open and close perfectly without binding, and make sure all the doorbell or electronics you re-installed works ok and is tucked out of sight in a good place.

Fabricate any additional pieces of molding needed if the gaps are significantly different in the framing of the new door.

Then insulate all big gaps with insulation, caulk where necesssary, slap your molding back on, make sure it looks neat, paint where necessary.

Step back and look at your work.