I've seen some meme's about imposter syndrome along the lines of "If it was really important, wouldn't they get someone better to take care of it?" and they've actually helped me relax quite a bit about my work responsibilities.

Also, I want others to be able to do my job. Being the only person where I work familiar with my shit is such a pain in the ass! I want to work on new stuff, not be cursed to answer the same damn questions every day because no one can be bothered to read the documentation I wrote.