I think flow is the more the state achieved, whereas mindfulness is learning to notice when flow is not achieved, or is achieved for the wrong thing.
For example, I can be in flow while coding, but if things get too frustrating I may drop out of flow. Mindfulness for me is noticing quickly that I am frustrated. If I don't, I may end up in flow while reading Hacker News; being mindful helps me recognize that state rather than getting caught in it until noprocrast boots me.
For example, I can be in flow while coding, but if things get too frustrating I may drop out of flow. Mindfulness for me is noticing quickly that I am frustrated. If I don't, I may end up in flow while reading Hacker News; being mindful helps me recognize that state rather than getting caught in it until noprocrast boots me.