What is the best tool is to study for the ASVAB without having to go to the class?

I am looking into becoming an officer in the near future. Which branch I'm going to is still up in the air. I'd like to gather information from fellow comrades regarding techniques and strategies utilized to achieve a great score, what worked for you, whether if it's a higher GT score or line scores. Any recommended study guides or advice would be appreciated. I have been out of active duty for a while and just want to know if there's any new information regarding this, aside from the obvious studying and refreshing of subjects. I've also had many people ask me whom are really interested in joining the U.S Armed Forces what's the best advice I can give them and I usually give them basic information, so that would be of assistance to our future brothers and sisters as well. Below I've setup a small survey of some known techniques just to get a general idea of what our service members believe to be most effective for them, sorry if I missed a strategy.

I do keep in mind that we are all individuals and we all learn differently so the way I learn may not be effective for others, but actual insight from the majority is at the least helpful and I bet I'll learn something from y'all. Some people are brilliant but just have poor test taking skills and vice versa.