Yours Quotes (page 86)
Don't solicit feedback on your product, idea or your business just for validation purposes. You want to tell the people who can help move your idea forward, but if you're just looking to your friend, co-worker, husband or wife for validation, be careful. It can stop a lot of multimillion-dollar ideas in their tracks in the beginning.
Sara Blakely
Trust your gut instinct over spreadsheets. There are too many variables in the real world that you simply can't put into a spreadsheet. Spreadsheets spit out results from your inexact assumptions and give you a false sense of security. In most cases, your heart and gut are still your best guide.
Naveen Jain