Kevin Dewalt writes about lean startups, customer development and picking technology for early-stage products.
HN commenters point to it as good advice on customer interviews and validating ideas cheaply, and also link a post on handling information overload.
Meditation can be a powerful tool for dealing with information overload and reduce stress. Even just spending a few minutes to consciously be still and clear your mind can help.
Kevin Dewalt explains it better than I can.
http://kevindewalt.com/2013/07/28/8-ways-meditation-makes-you-a-better-entrepreneur/
Justin Wilcox hits the ball out of the park on actually doing the interviews: http://customerdevlabs.com/2013/11/05/how-i-interview-customers/
Kevin Dewalt has some great advice too: http://kevindewalt.com/2013/01/28/how-375-and-craigslist-saved-me-months-of-customer-development/
Relevant post: "Why Lean Startups are Hard Part"[1]
[1] http://kevindewalt.com/blog/2011/08/05/why-lean-startups-are-hard/