“One who has the rule of thumbs at fingertips should not be all thumbs or fingers all thumbs at carrying the rule of thumbs to a successful completion.”
“Never trust a man who carries a handkerchief, I always say. One of many prejudicial rules of thumb.”
“There's one rule of thumb that suggests that you need one day of recovery for every mile run in a race. Another rule of thumb...suggests one day...for every kilometer run in anger.”
“If you are going to buy, a prudent rule of thumb is not to carry a mortgage greater than two years' income.”
“My rule of thumb for hitchhiking is: stick it up straight and proud and make if visible to all drivers.”
“The rule of thumb in student files seemed to be, "If you have nothing negative to say, don't say anything at all.”