Every book on this page I actually read, one day at a time. Work through the stages in order: each one gives you the words, the rhythm, and the ideas the next one builds on.
Being articulate is two skills stacked: having something to say, and having the language to say it with. The novels give you the language. The thinkers give you something to say. The craft books teach you to put it together.
Build the daily reading habit with books you can finish in days, written in clean, simple prose worth imitating.
This is where vocabulary, sentence rhythm, and range come from. Read them slowly; notice how the best sentences are built.
Long books finished one day at a time. These teach patience and give you the widest view of people, which is what you end up talking about.
Articulate people are not just fluent, they have ideas. These give you positions to argue and the precision to argue them.
Reading fills the tank. These teach you to write and speak with what you have absorbed, which is the whole point.