Read each word in the sentence from left to right with a natural speaking pace. At the end of the sentence go to the next sentence and begin reading it left to right.
Pause at commas in sentences. Think of this step like stopping to take a breath for one second before reading the next word in the sentence.
Stop at periods, question marks and exclamation points. Use these punctuation marks to read sentences with expression.
Raise your voice at the end of sentences when they end with a question mark. This gives characters in the story a voice and makes it sounds as if a question is actually being asked.
Read with feeling and excitement when sentences end with exclamation points. This also gives characters in the story a voice and makes it sound as if a dialogue is actually happening. Reader's Theater is one way to get more practice reading with feeling and expression. Timeless Teacher Stuff has scripts that can be downloaded for free to use to practice reading fluency.