Hadar Shemesh outlines a 30-day speaking routine: pick a new topic each day, spend five minutes preparing, then speak for three minutes straight. The practice forces you to use vocabulary you know but rarely say, building fluency and confidence on just five minutes a day.
Chapters
The first thing I tell my students to do is to create a 30-day routine where every day they are going to have to speak about a different topic up to 3 minutes. So you think about a topic, or maybe you give yourself a question to answer, then you quickly prepare for it, and you want to talk about it for about 3 minutes. That's it. You do that every single day. So all it takes is about 5 minutes a day, and that alone is going to really enhance your fluency. It's a lot of fun, and it requires you to think outside the box, that it requires you to use words that you don't usually use. Don't be like, oh, I don't know if I can talk about all these things. Challenge yourself, push yourself to find the words that you probably know but never use through talking about different topics.