I think the instant you have the oppurtunity, just do something you wouldn’t normally do and break your own rules. Like on your way home from work, stop somewhere and just have an adventure. go to the park. In the middle of the night, just get up, and go outside and look at the stars. Get up really early and go do something, like get coffee and meet new people. Dress differently, and spend all day wondering what people will say (that might be depressing if no one says anything though) Take the long way home or to work. Get a pet. Get involved in politics. Do your daily routines in a different room, or outside even. Move. Dance. Scream. Stretch. Get a new haircut. Get a new style. Call old friends you haven’t spoken to in forever. Buy something for yourself. Love. always refreshing.
Remember your childhood dreams and find a way to do them.
Everything peedub said was great, especially rearranging the furniture and changing the way you do things.
I guess I sorta took your question as how to make life more interesting but w/e. I could continue forever but i have an exam tomorrow..