While celebrating wins is hard but important, I know from personal experience that founders can be particularly bad at it. So this description of how LinkedIn CEO Jeff Weiner runs staff meetings was helpful:
Weiner also kicks off these weekly staff meetings a bit unconventionally with “wins.” Before delving into metrics or the business at hand, he goes around the room and asks each of his direct reports to share one personal victory and one professional achievement from the previous week. This ritual infuses these meetings with positive energy from the start. Otherwise, Weiner notes, they have a tendency to devolve into a round robin of complaints.