Everbody notices what you failed to do. But nobody appreciates what you succeeded to do. That's rather frustrating, isn't it?
Appreciation is always a good motivation. And if nobody else appreciates your efforts, you'll have to do it yourself. Set a target for the day, the week or the term and do also set a reward for yourself that you can look forward to, e.g.:
If I achieve the target, I will treat myself to ...
- an adventurous monster killing game on my computer
- a visit to the cinema at the weekend
- a short trip to London
- ...
If it's a long-time target, write your reward down on a piece of paper and hang it up in a place where it catches your eye. This sure will be a good motivation.
Go for it!