With prices rising and salaries remaining stagnant, many Americans are looking for ways to save money and stretch their buck.

Author Mark Di Vincenzo says if consumers choose the "right time" to buy, they can save money and even improve the quality of goods and services they receive.

In his book Buy Ketchup in May and Fly at Noon, Di Vincenzo outlines the optimal times to make purchase, from everyday items like groceries to once in a while expenses such as trips and surgery.

Di Vincenzo spoke with CBN News about his book and the tips he gives.  Click play for his comments.