About your work:

No one else is forcing you to do your work. You've decided to take it on. Don't waste your energy in hostility toward others. Accept and live with your own decisions.

Start early. The sooner you start, the sooner you will be free to do other activities, you will experience less worry and you will have more time to recover from mistakes and "wrong directions".

Expect a certain amount of tension. Use that tension as energy to get yourself moving.

Different people have different styles of working. For example, some people need competition to do their best, while others work better at their own pace. Respect your work style and arrange the condition you need to do well.

If you have a long, hard task, make it as comfortable for you as possible. Do it in short bits (but stay with it); do it wearing comfortable clothes; among friends; in familiar surroundings; with whatever you need to keep your spirits up while you work at it.

Pure, unadulterated motivation is rare (most of the time); you just have to keep plugging away.

If necessary, pause every now and then to remind yourself why you have chose to take on certain work and what you expect to get out of it. Give yourself a pep talk.

Completed tasks keep interest and motivation at a higher level. Try to complete a task or accomplish a sub-goal before you quit for the day.