I tend to compare myself to how I’ve performed that certain task previously. Trying to improve on what I have done in the past. This can however get out of hand a bit, when I start to obsess over details that must be adjusted to perfection, even if the completed product will not be affected in any major way because of it. I could probably benefit from taking a step back, looking at the big picture, not focus so much on the tiny details, and try to get more stuff done instead of perfecting things nobody cares about.
I can’t say that I’ve ever had a problem with being concerned about what others think of me, partly because I’ve looked really weird in my youth, so I got used to people staring all the time and I started ignoring it. If I feel comfortable with how I look or what I think then that’s all that matters.