I don't know if this was added already or if it counts but here it goes.
Setting up the friend(s) with one of your LIs
To be frank, I find this action kinda stupid, it's sadly because most of the MC's sidekicks are written to be attention seeking idiots that are too afraid to go after a woman for themselves without your help. I hate this as it feels like you're giving up one of the girls as a consolation prize out of pity to a character that quite frankly has not earned that right and is not on her level.