Tautologies

A tautology is the use of a redundant expression - you are effectively saying the same thing twice. They are very common! For example very unique is well used.

Here are some to be avoided where possible.

Bad	Good
absolutely essential	essential
at a later date	later
basic essentials / basic fundamentals	essentials / fundamentals
collaborate together	collaborate
completely surrounded	surrounded
current trend	trend
end result	result
in conjunction with	with
join together	join
look back in retrospect	look back
mutual cooperation	cooperation