-Tetsu-

I used to write lots of stories and lost motivation for similar reasons, so I took up roleplaying, since it became easier to write stories with more people.

I never thought that there would be any replies T-T 
I've already tried a lot of all the things you mentioned, but sadly I can't do any of the physically demanding things anymore because my job is exhausting af. Probably I should try to find some more new books and start reading again. Maybe my imagination will come back and I'll be able to continue my own stories.
Thank you for all those awesome ideas!

Hey, just my 2c: if something looks interesting but you can't seem to get into it, don't give it up immediately. I've observed that after long periods of apathy I need to push through an initial warming up period, and then I get hooked on whatever I'm doing and it becomes easier by the day.