How to boost my grades big time?

You just have to try as hard as you can. Its difficult to give up old habits.. I'm in 11th grade now and the only way to make it through high school is to stay organized and STUDY STUDY STUDY. Even if its boring, you have to make it interesting for yourself. You admit that you have problems of not studying and not doing homework. Doing homework will increase your grade by at least 30%