Remember, there is no set syllabus for the techniques you should know in order to get your blue or any other belt
. Instead, students are promoted after they show they can deal with various situations that the next belt level would be able to do so. Once the Instructor believes the student is ready he will promote him to the next belt level by giving him his new belt. If you would like to progress your belts as fast as you can the recommendation would be to make sure you are training with the right Jiu Jitsu gear, train as often as you can and of course always keep in shape. Many instructors would tell you that the more you compete the faster you will get your Jiu Jitsu belt promotions. Good Luck!