As entrepreneurs or project leaders, we often wish there was a way to predict the future and determine whether a decision is right one. Painted door tests offer a way to quickly see if a product feature is worth implementing by building a non-functional version and observing user engagement. This approach has been valuable in product development but can be applied beyond products to make decisions on marketing strategy, hiring, and more. The painted door test philosophy involves allocating small budgets to test different options and measure engagement, helping businesses make informed decisions with minimal risk. By applying this approach across various areas of the business, companies can gather insights to verify their ideas or fail fast, ultimately making the smartest decisions possible.