In general I'd keep an eye on the articles and interviews on indiehackers.com.
Specifically, I recommend checking out these articles: How Seth Godin Would Launch a Business With a $1,000 Budget[1], A Guide to Running a Minimalist Startup[2], How to Launch a Product With No Money and No Customers[3], How to Ship Side Projects[4].
For something a little more comprehensive, check out GrowthLab’s Ultimate Guide to Starting an Online Business[5].