Preparation, strategies, resources, errorlogs

I took challenge 17 and the experience was a good lesson. I was very good in Quant section at one point of time. Now, it was difficult for me to sit through the session. I made very silly mistakes and my quant skills need to be brushed up at the moment. I made mistakes in very basic questions. I think I will have to brush up my basic skills first. I am going to be on this for a week now. I will take the challenge once again next week. Let me see what improvement can I have in a week. I have to really rush up now. I have to give my GMAT in two-three months from now at any cost. Work hard is the only thing that I can tell myself.