What should I do if I feel tired when working as an accountant in a small unit?

The main reason why I feel tired is because I haven’t let go of my thoughts. I must let go.

Firstly, you should let go of your mind, concentrate your thoughts and wholeheartedly when working, and try not to delay get off work until after work;

Secondly, you should think about your day when you go to work in the morning. Work arrangements (write them down), finish your own work and the work temporarily assigned by the leader, and stop thinking about work after get off work;

The third is to plan things for the next weekend on Friday, try to plan to go out for fun or Exercise and exercise to release your whole body (forget about work).