When someone’s behavior doesn’t match your expectations, make a generous assumption.
Assume that their failing is a result of being busier than you can imagine. Or assume that it’s because they’ve had a sinus infection. Assume their parent is in hospice, they’ve just lost a pet, they stubbed their toe in the shower this morning.
It doesn’t matter whether your assumption is accurate: just that you put them in a favorable light in your view of them.
With that generous assumption, you are able to work together more easily, and overcome whatever failures have impeded your collaboration.
Take the next step on generous assumptions, too:
Assume that your collaborator needs clarification because you weren’t clear enough. Assume they will appreciate one more gentle email reminder. Assume that they will appreciate your guidance someday, even if they bristle now. Assume they want you to push them and critique their shortcomings so they can get better.
Always with love.
Make generous assumptions, and act as if they are true.