If you don't stutter by yourself, grab a book or some text. Silently read a paragraph in your head. Not so fast that you skim through and not as slow as the real aloud reading. Words, associations, of where you've struggled before, will bubble up a small anticipatory reaction. Go back and read it aloud. Stumble as you may here and there, keep reading. Let your eyes keep shifting through the text. Then do the same with the following paragraph. Don't take the small victory of trying to consciously AHA your anticipatory reaction by proving you fluently said when reading aloud. Simply pay no mind and keep reading. After some time of reading, say half an hour to an hour, you will grow to indiscriminately approach every sound and syllable and word and sentence with almost the same neutrality. Anticipatory tendencies lose strength and die out once they lose functional associations to specific sounds, syllables, and words, because that's how they got attached to memory in the first place. Nurture this state through regular practice.