If you want to learn Japanese the fastest way possible, read on. Notice I did not say the easiest way possible. If you think learning Japanese is easy, well, you can stop reading now. Presuming you want to learn Japanese, I offer the following best-ever tips:
1. Stop whining
I don't want to hear about how hard it is to learn Japanese, nor that it is one of the hardest languages in the world to crack, that it has three different alphabets, or that you need to learn over 2,000 kanji just to read a newspaper. The truth is that no foreign language is easy to learn and all languages have some aspects that make them harder to learn than others (giving objects genders, for example? Oh, c'mon!) and other aspects that make them easier to learn (no singulars or plurals? Yay!). So just accept that learning a second language is going to be rough, especially if you are learning it as an adult.