For me to stay motivated, I need to be organized and I need to plan- if I know what I have to do in a day I am able to stay motivated until the tasks are completed, it is also helpful fro me to write down all my tasks on a piece of paper so that I can tick them off as soon as I finished them, which motivates me to do the next task.
A bit of encouragement from me: Set clear and specific goals for yourself but goals must be manageable so break them down into smaller parts, and reward yourself after completing tasks. Get yourself a support system that understands your goals so that they can keep you motivated when you can't see yourself finishing the tasks.
Good luck.