Three things help me when I can’t find the motivation to finish a task where there is nothing keeping me accountable.

Five minute rule, If I know the task can be finished in five minutes, then do it now.

Two minute rule, If the next steps are not clear for a project, just start and do something for two minutes.

Time box, If I have a clear understanding of what needs to be done, then time box a part of it, usually in multiples of thirty minutes, and attempt it.

Two hour rule, Do not work on the same problem for more that two hours if you are stuck, do context switch or take a break and come back to it after a day.