1. Always have a few different writing projects/options available.
This gives you variety and something to choose from. You might not be in the mood for one topic, but could muster the motivation to focus on another.
2. Warm your brain up.
By this, I mean simply writing out all the “junk” as a warm up to your actual writing session.
A lot of people get held back by not knowing what to write and eventually get into a flow. This usually helps get to that point of “flow”.
3. Take a shower, go for a walk, workout, yoga, etc.
Especially after you’ve done some research, this is a great treat to yourself and your mind.
Have you ever had an “ah ha!” moment while trying to fall asleep, or while in the shower?
Taking a quick walk helps me to shake off any negative moods. Plus reminding myself to breathe deeply.
Sometimes I’ll do a bit of other work that uses my “logical” aptitude (like randomly writing out a list of numbers, then adding them up on paper) so that my “creative” aptitude gets a break.