Me and my team are creating a web application which is going to solve the problem of "procrastination" and "discipline" for freelancers, digital nomads and people working from home.
Reddit has been great for identifying the needs and demands of people who suffer from these problems.
There are geat subreddits that exsist for almost any topic and looking through post and comments, asking questions yourself can give you some very quality feedback.
If you don't use Reddit for this purpose, where else do you conudtc market research and validate your ideas?