16 startup founders share their best advice for aspiring entrepreneurs

• Business advice from entrepreneurs, startup founders, and CEOs comes in handy.
• We asked 16 entrepreneurs to share some words of wisdom, based on lessons they've learned and mistakes they've made along the way.
• That wisdom includes: Let other people help you, know your customer, and make decisions with data.

Every business will face some unique challenges as it grows. But there are certain roadblocks in startup life that are common among entrepreneurs.

So it helps to get advice from those who have been in your shoes.

To that end, we asked 16 founders and CEOs to share their best business advice for other entrepreneurs (or aspiring entrepreneurs). Here's the wisdom they want to pass on, based on lessons they've learned the hard way.