Tighten writing when you can, eliminating redundancies and other unnecessary words and phrases. Watch for these types of words and phrases, which add little or nothing to the meaning. Kessler and McDonald, and Bremner offer many other examples:
qualifiers like very and somewhat.
a total of
down or up tacked on to verbs, as in start up, finish up, close up, close down
8 p.m. tonight instead of 8 tonight or 8 p.m. today
A caveat: Dont eliminate words mindlessly just to shorten phrasing. A pass good for 10 one-way rides is better than a 10-one-way-ride pass.