This is very useful and good tips:
I chose these English grammar
tips based on the
written questions I get from teachers and students around the world. The following points are a summary of the most common mistakes I see, and the way to correct them.
They are, however, by no means a
summary of ALL the English grammar mistakes.
That list, I believe, is endless 🙂
I also came across with this article: https://grammarcops.wordpress.com/2011/09/22/more-or-less-grammar/