Perfection

I have the strange tendency to always want to strive for perfection. If somebody says you should do this, this and this way, I save it onto my harddisk and remember it... I will always try to incorporate 'critique' into my further actions. Would this be for my drivers lisence or in a relationship, I save 'critique' and try to do it better next time. In general, this is a nice thing, since it makes you develop and grow. But it also puts a lot of pressure on yourself, always wanting to do it 'right'. Especially since you probably will never do it entirely 'right'.
It also makes me very insecure sometimes, since I do not leave much room for myself to make mistakes. Moreover, I am afraid of being judged for the mistakes I make. I have the tendency to feel like I will not only fail myself, but mainly others by making mistakes. But the real question is, what is a mistake and how should you fix it, or even if you have to fix it at all. Anybody can make mistakes or do something in a way other people don't like. I just have no clue where to draw the line and not be so hard on myself...