When I'm stuck in my writing, when a character has drifted into the doldrums, and when I'm not sure of anyone's motivation anymore, I find making my characters write a "To Do" list is a great prompt to get things back on track. Not only does it give me a course for what needs to happen next with the plot, it can also help flesh out the character as a whole. The fact that my heroine is out of tea bags might not need to be in the final novel, but I now have a greater sense of her character just by peeking at her list and seeing her preferences (she likes Tetley, for the record).
To Do lists are helpful for villains and secondary characters that have a tendency to become cliched or lifeless. They can reveal their motivations and ensure everyone in the manuscript has an agenda.
For example, let's look at the simple story of Snow White & the Seven Dwarves.
Snow White's To Do List:
-Ensure I stay hidden from evil stepmom
-Continue kindness to strangers on my doorstep
Evil Queen's To Do List:
-Research poisons (apples viable option? check)
-Brush up on disguises
-Buy new mirror
Handsome Prince's To Do List:
-Give the horse a run
-Look for beautiful maidens to rescue (forest might be good? check)
I'll save you from each Dwarf's individual list, but you get the idea. Character To Do lists are especially helpful if I've just ended a big scene, or I've reached that dreaded spot where I have no idea where to go next. Just a little tip to help keep things rolling along. Happy writing!