7. Try a new ending
Elden Ring’s six different endings could be a satisfying enough carrot if you’re a mod-averse traditionalist or achievement hog, though they will require you to finish the game six times (or save and reupload your file to pack achievements into one playthrough), albeit in six specific ways necessary to obtaining each ending.
Within those six games, you could end up using some of my previous tips like trying new builds or questlines, or you could entertain yourself by trying speed or gimmick runs. Give yourself arbitrary confines like no leveling up, no upgrading, or no maiden and see how far you get in unlocking your quest to become Elden Lord again, again, and again.