What time of the day are you most active? What time of day are you most active?

I am what you'd call a morning person. I am what you'd call a morning person.

I always wake up at 5:30, even on the weekend, so I can [do a lot of things at AM and take some rest at PM/get a lot of things done] in the morning and rest in the afternoon. I always wake up at 5:30, even on the weekend, so I can [do a lot of things/get a lot of things done] in the morning and rest in the afternoon.

If you're talking about doing tasks, it sounds a little better to say "get a lot of things done," but "do a lot of things" is also fine. It's best to use "morning" and "afternoon/evening" when you're not saying a specific time.

I always wake up at 5:30 even on the weekend, so I can do a lot of things at AMduring the day and take some rest at PMin the evening. I always wake up at 5:30 even on the weekend, so I can do a lot of things during the day and take some rest in the evening.