Start learning the second language and don't stop. Any and all of the following, in any order, skipping between them when you get bored or want to try somethin

Start learning the second language and don't stop. Any and all of the following, in any order, skipping between them when you get bored or want to try something different. This is just a list of options you've already worked out for yourself. Books (do them properly, cover to cover, answers all the questions and listening to all the conversations on the CD or whatever), specific books on grammr, making your own notes of topics of interest, websites, apps, making up conversation on your own, (paid) skype conversations with native speakers, evening classes, take a holiday there (and maybe take lessons while there on holiday). The only common link amongst all people who learned a second language is that they started learning and didn't stop. That's the common link. That's how to learn a second language. Stop spending time trying to pick out the "best" option and just start. Pretty soon you'll have worked out what you enjoy most. Just start learning and don't stop. Start now, don't stop.