I came across a really interesting paper yesterday by Scullin et al. (2018). A small group (N=57) of 18-30 year olds were assigned to two groups - one wrote about tasks they had completed in the last few days and the other wrote about tasks they needed to complete the next day. The participants in the 'to do' group fell asleep faster.
The paper suggests that people might fall asleep more quickly if they make a to do list for the next day, just before bed. It seems that the more specific the tasks are the better.
I think I need to try this out! I've been using Wanderlust, an app for list-making, for the last week and think that making my to do list on that just before bed could work for me. Let's see!