Writers are often advised not to wait for inspiration to begin writing. That is, to achieve their goal and write a novel, they have to write every time at a predetermined time, regardless of whether they feel the inspiration or not.
This same advice applies to all professions and to any project you are working on. Instead of waiting until you feel the desire to start work, proceed to it regardless of the mood in which you are.
Strive for the balance of "Game-work"
From time to time you feel that two different people live in your head. One of them is disciplined and responsible and wants to succeed. The other is carefree, funny and wants to have fun.
To achieve goals you do not need to stop the second person and all day long be a concentrated workaholic. This is a wrong approach. If you ignore the child within yourself, he will find ways to sabotage you. Therefore, rest after a serious work. And best of all - learn how to combine the game and work, if possible.