Revision becomes more manageable when you know what a paragraph is meant to do. It may introduce an idea, explain a process or provide an example. Write that purpose in a short sentence before changing individual words.
Check whether the opening gives the reader a useful direction. Then examine each following sentence. If it belongs to a different question, move it elsewhere rather than forcing a transition that hides the change of subject.
Replace vague references with clear nouns where needed. Read the paragraph aloud to notice a missing step or an overloaded sentence. Shortening helps only when it preserves the relationships the reader needs to understand.
Finish by comparing the revised paragraph with its original purpose. It should now be easier to follow, not merely more polished. Keep a copy of an earlier draft if a substantial cut might contain material useful for another part of the piece.