I would definitely recommend to listen the ycombinator startup school podcast. They cover a lot of concepts for beginners. If their plan is to take a more bootstrapped approach then I would teach them about the audience first approach. Speak more about finding their audience and talking with the clients before even starting to build the MVP. Have a look into the steps of my bootstrappers guide, it can be helpful
writen by Tiago Ferreira
Thank you for the suggestions Tiago Ferreira
writen by James Trimble