I have spent the day proofreading a booklet, written by A N Other for my partner. Ten pages of booklet have generated five pages of notes. It's a pdf so we can't edit it directly.
Missing commas, overlong sentences, logical disconnects 'the wind that night was calm with occasional gusts..'
loose/lose, effect/affect mistakes, erroneous photo captions etc.
GGGGGGRRRRRRRR!