Assuming you mean less than ~10 years old: Wake up, get cereal (or real breakfast if someone else is up and making it), watch TV or play games (C64, Amiga, PC, or Atari 2600 depending upon when we are). Chores. Maybe run around outside doing something in the yard/woods. Read. Homework, if I had any over the weekend.

I mostly lived too far away to go hang out with anyone my age and was bouncing back and forth between parents' houses every other weekend. On rare occasions, I might spend Friday night at a friend's house if I was allowed (parents would sign a thing I give to the school that also signs it so I can take the bus my friend used instead of mine). Definitely not routine, though.