GMAT Strategy

I have done the GMAT several times a few years ago but none of the past attempts generated good results (feel ashamed as all were below 550). I checked back my results and tried to analyze what went wrong. It seems like I am a bit weak on the Verbal side where reading comprehansion is the my weakest skill and I need to brush up on but don't know how? By the time I finished reading the darn thing, it's like 2 minutes later and I don't even understand their main idea!!!!

Also, I found it so hard practicing at home.... because it's not real and you kept looking for the actual answer where in the GMAT test room, I can't..... please help