Learn some tennis, rugby, archery, fencing, swimming etc. Get active.
Learn to sing, play the piano, violin, guitar, flute, drums etc. Get musical.
Learn some french, mandarin, spanish, german, hindu, japanese etc. Get cultured.
Learn some programming, create robots, create animations etc. Get technical.
Improve your math, english, finance, economics from K to Uni level. Keep learning.
Learn some yoga, hit the gym, run, fly a kite etc. Live longer.
Learn how to surf, date, personal development etc. Enjoy life.
Learn how to do make up, manicure, pedicure, sew, cosplay etc. Look good.
Learn some photography, cooking, pottery, gardening etc. Literally anything.