I've created my share of failed side projects. There's a few things that I've learned (am learning). 1. Test the market as early as possible. This doesn't need

I've created my share of failed side projects. There's a few things that I've learned (am learning). 1. Test the market as early as possible. This doesn't need to be user conversations. Start testing the basic assumptions with product - it's a bit of an art to figure out how to do this. 2. Traction will take much longer than expected. So don't quit your day job, literally. 3. I won't build anything where the product doesn't market itself. It's too easy to make step one building the product and then step 2 is pretending to market/sell it, but pulling the rip cord after $500. So, it seems worthwhile to focus on ideas that if they work, will naturally spread. Good luck!