An editor's editor, Sol Stein has provided advice to writing giants. Wouldn't hurt us bloggers to incorporate some of it either.
I like what Stein advises here:
Stein's formula, 1+1=1/2, designed to remind writers that conveying the same matter more than once in different words diminishes the effect of what is said. If the same matter is said in two different ways, either alone has a stronger effect.
I liked this advice.