Effective Paragraphs:
One key idea (usually in the first sentence with supporting details in the next sentences).
Sentences are connected and build up the MAIN idea.
A variety of sentence beginnings. [Use something else instead of: Then, When, After...]
A variety of sentence types. [Statement. Question? Exclamation! "Speech"]
A variety of sentence lengths. [SIMPLE or COMPLEX]
Specific words (clever vocabulary) chosen carefully and used appropriately. [JUICY Words, Topic Words]