Spend 16 hours fully, surfing net, watching tv, play game, go
out with friends, bf/gf, go clubbing at night, go ktv, do some
sports, read some books, chit chat with friends, go arcade, go
lanshop, have sex, watch movie, go window shopping, improve
yourself by borrowing some books from library, take up courses,
study overseas and so on.. and the rest of the 8 hours, you can
sleep peacefully at home.