I find I have this big writering problem of showing the MC's "tool kit" before the individual "tools" are often needed. I felt this was a lack of personal confidence on my part, but it also seems standard in most fanfics to show rather than tell the story and pull out the "device" when it's needed
No thinking about planning, complications, time management, you just put your fingers on the keyboard and write.
Sometimes that's all you need. Get out of your own way, and you'll see you've had fun.
...I should take my own advice.