Before doing something like sitting at a desk all day, try to get outside and move around. Even just walking around the block can help.
"Keep a glass of water beside your bed to drink first thing [in the morning]." Most of us start the day dehydrated after going 8 or more hours without drinking.
Simple actions like arranging 30 minutes to walk your dog, calling a loved one, or seeing a friend for coffee/tea count. These may boost energy, pleasure, and productivity.
Increasing energy is difficult. Follow these ideas, but also listen to your body to learn what it needs to perform well.
At first, it can be hard, but we're sure that if you're disciplined and keep at it, you'll be on the right track!