I spend a lot of time talking to founders in the consumer electronics and iOT startup community. I've spoken with multiple founders and observed others developing their hardware+software product, and I've noticed a few helpful insights that I've ended up repeating. I thought I'd post those thoughts here to help you as you start your journey to make and sell a product.
A lot of this is based on my own experience building products at KiLife Tech. I am adapting a general design process that is a simplification/adaptation of the FDA design process for medical devices(warning: don't always look to the government for good design processes). Please leave comments and/or suggestions.