I used to be a great speaker, never had problems with tongue twisters or pronouncing words etc, but lately I sort of stutter. I will be talking and on a word that would normally be easy to say gets all jumbled up and comes out in a mess of syllables.
Also the tip-of-the-tongue feeling on other words that may be related..

Any ideas on what could cause this and how to fix it? I constantly read books but I don't really talk as much as I used to. Could it just be the fact that i'm not "working" my brain/tongue, or is it something more?