Ten traps for proofreaders

Heads and subheads – believe it or not we often forget to check these.
The first few lines after a head – for some reason we just assume this is correct.
Strings of small words – (if it is in the basket…).
Proper names – check and recheck these.
Numbers – transposed numbers are a common error.
Sequential lists – is the numbered or alphabetical list in sequence? If the text says there are six reasons, are there six in the numbered list?
Quotes, brackets and parentheses – it is easy to leave out one of the set.
Footnotes, tables, figures, charts – are they numbered in order?
Table of contents – does it reflect the headings in the text and are the page numbers correct?
Inconsistent style – always makes sure you get a style and stick with it. For example:

dates (will it be day, month, year OR month, day year)
measurements (imperial or metric)
numbers (will you use commas or not in four-digit numbers)
capitalization (will you use upper and lower case for titles, e.g., chair of the board or Chair of the Board).