Give no artificial teats or dummies to breastfeeding infants.
He could now have become president himself, but preferred to rule through dummies.
I note that the same author has written Internet Auctions For Dummies, another vexing subject.
If you need advice, there are also many books available, like Resumes for Dummies, and some of them even target specific industries and offer sample letters.
If you're ready to move beyond free online resources, a search for SAT for Dummies at Amazon turns up a wide variety of preparation books.