I do at least one digital drawing every day. I have done this for more than five years.
How have I been able to keep this up? I have gotten pretty good in making up drawing prompts. It's not easy sometimes, but one trick I have done a few times is to use the alphabet to create a series - also known as an abecedarium.
For this series, I combined letters with animals that started with that letter.
Left: blue bear in a bag; Center: cat in a collander; Right: parrot in a pot
Left: rotated robins; Center: mouse on a mountain; Right: an otter juggling oranges