It may be just a weird thing that I do, but when I'm learning a new language, in my head I try to repeat everything I say or write with the other language's version. (ex: "good morning" <--out loud "ohayogozaimasu!" <---in my head) At first, it can be fairly disappointing as you'll mostly only be able to say courtesies, but it's a good way to find out what you would need to learn in order to be conversationally fluent and what's useful in day to day interactions.