The development of good study habits is a lifelong skill. Here are some resouces to help you along as you seek to refine your already existing skills and develop new ones.
Middle School Study Skills http://www.schoolfamily.com/school-family-articles/article/10695-middle-school-study-skills-getting-organized
A Teachers Ten Study Tips for Middle School Students http://www.brighthubeducation.com/teaching-middle-school/3521-study-skills-for-middle-school-students/
Improve my High School Study Skills http://www.cbcurtis.net/SlausonMain/SlausonMain/Orientation_Meetings_files/Improve-My-High-School-Study-Skills.pdf
Top ten skills for High School Students http://school.familyeducation.com/skill-builder/college-prep/37653.html