live in the country even if you have no experience so youre exposed to the language all the time, or put all of your stuff into the spanish language me thinks.. also have flashcards too!

Watch shows in the language you want to learn and pay attention to the characters expression

i'd say be around people who speak the language & watch media that's in said language. (literally how i learned english)

the thing that worked for me is learning 3-5 words everyday !!
i did this for french since i know english and korean fluently