Design is part art and part science. You’re applying your skills and knowledge to solve specific problems and, very often, to support the goals of your clients as well as your end users. At each stage of a project, designers should receive—and should welcome—thoughtful feedback that will help them arrive at an optimal design solution.
Being receptive to feedback, however, is its own challenge. You’re putting your own thought process and creativity up for critique, often by a mixture of fellow designers and laymen alike—yikes. To stay cool, you must learn to not take any reasonable critiques personally. To make it useful, you must be able to interpret and assess feedback and apply it strategically to your process.