GMAT Strategy

So I took the gmat in October. The day before I completely freaked out and decided that I was only going to take the test and cancel it just to get a good sense of the test. Truth is I had only been studying for it for about 3 weeks and didn't go about it the right way at all! Now I'm retaking it in less than a week. Ive been reaching out to every free source I know. I have taken 2 CAT's and I'm taking another tomorrow. Each time I have improved a little. I keep the flashcards from this site with me AT ALL TIMES. I bought the Offical Guide 13th edition and Kaplan Premier as well as the Math and Verbal workbooks for Kaplan. I don't really know if there is anything else left that I can do. My studying has been pretty crazy. I haven't followed any set plan. Just read the books and used the error logs on this website to do DS, PS, SC, RC, CR. I haven't even had a chance to look at Integrated Reasoning and I have only wrote 3 AWA practice essays. Is there anything else that I can do at this point? I just get this feeling that I haven't done enough. This is my last chance to take the test!