A few reminders that keep me doing. Might work for you too, pick one or more.
I can do all things through Christ who strengthens me. – (Philippians 4:13)
If it can be done in two minutes or less, do it now.
Try not. Do or do not. There is no try. (Yoda)
The journey of a thousand miles begins beneath one’s feet. – (Lao-tzu)