Before you know the difference between being a “pro” and an amateur, you wonder about how you spend your time during your business day. A lot of colleagues and/or “others” are lunching together and so you think that’s what professionals do: they lunch. The question is never whether to accept a lunch invitation. The question is whether to turn pro. I reference Steven Pressfield‘s book, Turning Pro, and highly recommend you read it! I also reference the personal versus your professional self video.