how to writte a paragraph?

To writte agood paragraph we should be clear about what are the principals parts of a paragraph.
I think that you shoud start with the topic sentense. Because this sentence tells you what is going to be the pragraph about. After this sentence therest of the sentences are supose to support the topic sentense. They are going to be the secundaries ideas in the paragraph. All of this ideas should be related with a transition words like also, besides, and, all, towards...