Have unanswered questions about creating good paragraphs? See if they're answered here.
How to spot irrelevant details
Think of your paragraphs like mini versions of your paper. Each paragraph will begin with an introductory statement, it will include a main point, and sub points to back up that main point, and it will end with a concluding or transition statement to smoothly move on to the next point.
Take a look at this graphic from the Purdue OWL on how a strong body paragraph might be structured:
YOUR TURN:
Use one of your main points to develop a solid paragraph. Come up with an introductory statement, add your main point, add sub points, and develop a concluding statement that will transition smoothly to your next point on your outline.
Now let someone else read it. See if they can tell you the main point, sub-points or examples, and back-up sentence(s) in your paragraph, without giving them any hints.