Oh hell, that's a tough question...I still struggle with it myself. I always feel like if someone doesn't tell me i did a good job then i take it as it wasn't good enough so i seek out others to tell me that. ways how to not care what people think....i think if you just sit and concentrate on the task at hand like writing, if you sit down and think hard to yourself what could go into what or how to improve your craft then you'll find yourself too tired to even think about what everyone else thinks. it's kind of like if you wear yourself out mentally thinking of something you want to work on then you'll be able to block out what other people think. i hope that makes sense