I read an excellent quote on here:
The worst thing you write is better than the best thing you didn’t write.
That is one of the mental blocks which most people (including me) have which usually results in not writing anything. I can tell from experience that 98 out of 100 people are geniuses because of the amount they have spent practicing their respective arts.
It’s time I started getting over the fact that I am an average writer and have miles to go before I come anywhere near to writing something valuable.