You can give constructive feedback to your boss with less unease. The key is making it fully formed, thoughtful, and delivered with timeliness and tact.
Do manage your emotions so you’re calm and these crucial elements don’t go missing. Your approach: View feedback as a way to enhance your workplace. Doing so will naturally cause you to exhibit a positive attitude. You will avoid a negative tone or approach seen as unwelcome complaining or attacking your boss. When you deliver feedback positively, you are not a pest but a welcome guest.
For added receptivity, request permission to give feedback. For example, “I have some thoughtful input on this project we are involved in. Is it okay to share it with you at this time?”
Source: UTEAP FrontLine Employee (April 2015)