Have a girlfriend/wife/boyfriend/mom/dad/brother/friend who is mad at you? Gift them a simple promise gift saying " I promise to never hurt you again" (or whatever you did wrong). This completely heartfelt and personalised gift would make them melt. You can also get your vows framed and gift them to your life partner as a token of your love.
Seal your promises in a glass frame and keep them forever!! They can be as simple as I promise to order us make up pizza every time we fight or I promise to not watch Netflix series which we started together with you.