In the afternoon I usually play on my computer, watch tv or play with my pets. After a couple of hours I start making my homework even if I'd love spending another couple of hours sleeping or doing nothing.
In my opinion the best thing I should do in the afternoon is homework! If i have it done around 4 then I can spend the rest of the day the way I please without complaining or being stressed about the homework that I have to do at a late hour.
