How to properly estimate the time cost of development - its been a total nightmare trying to gauge how long our app will take to develop. We've had such a varied degree of estimates and calculations based off the same spec!
How to build a community for Product Hunt
The vast majority of PH guides say to build a community and even given lists of Facebook groups, Slack groups, etc. However, those Facebook groups are just people posting their hunts. There's no real community built. I wish there were a guide that showed how to build a community, which communities had the best engagement and examples of that engagement.