Over the past 20 years, a series of reports written by groups of senior researchers and administrators have recommended changes to improve the training environments for graduate students and postdoctoral researchers in the United States. However, academic institutions and departments have largely failed to implement these recommendations, which has exacerbated the problems faced by these trainees. Here, based on input from trainees at different career stages, we outline seven practical changes that academic institutions and departments can make to improve their training environments.