I decide to go for freelancing. So I check odesk and saw plenty of jobs. I decide to start out with article writing first because I heard it the easier beside data entry. I was going to try out, but I thought about my grammar. I always had grammar problems. So I thought you guys help me out and give me a source to a grammar guide(short one). If you have a long one, I take it in case when I want to get more into English.