For example, we all know that Learning a new language is supposed to take a long time. There are new rules to memorize and new words to learn. You have to learn and Practice and remember tons of things, and all that takes time.
So how do you know which tips to use? You can always choose the language learning methods that work best for you. But that often means you needs to try many different methods before your favorite one. You might waste a bunch of time trying other methods that do nothing for you before you find the perfect ones.