There is no "one size fits all" study method which works for every single student, because each individual learns differently. One must take into account the various learning styles, special needs, and personal preferences of each student in helping individuals to come up with personalized study methods which work best for them. There are seven categories of learning style  in which a single student may fall into: Visual, Auditory, Linguistic, Kinesthetic, Logical, Social, and Solitary. A student may fall into one or more of these learning styles, but they will always be more inclined towards only one or two. If a current method of teaching is not working, it is the teacher's job to ascertain which learning style best fits the individual student, and then alter instruction to accommodate the student's needs. Individual students may also have special needs or learning disabilities such as ADHD, dyslexia, etc. There are a variety of studying tools which have proven to help students with such special needs, such as taking frequent breaks for students with ADHD. Finally, a student's best study method may simply come down to personal preference, and these personal preferences should not be discounted. Combining personal preferences with best-fit learning styles and/or study skills for those with special needs is the best way to create a personalized study regimen for each individual student.
In today's classrooms of 20-30+ students per class, it is impossible for teachers to individualize learning for every single student. There must be a "one size fits all" method of teaching and studying to appeal to the broadest possible range of learning styles for an entire classroom of students. The theory that students have individual learning styles has been roundly debunked. While students do vary in their receptivity to certain modes of information delivery, the effectiveness of teaching and learning correlates more strongly with whether the pedagogical methods are matched appropriately to the content, rather than individual students.  
[P1] There is no single study method that works for every individual student.
Rejecting the premises
[Rejecting P1] There is a best study method for every student to succeed in school.