1. Hiten Shah, KISSmetrics and Crazy Egg
Regret: Not looking for problems.
Most of my early failures were a result of building thingsdidn't want. What I would have done differently is to find the right problem to solve for customers before writing a single line of code. It would have saved me a countless amount of time and resources. —Hiten Shah
2. David Hauser, Grasshopper
Regret: Not investing in culture.
I wish I had focused more time, thought and money into the company culture from day one. I have since discovered this to be the most important factor in the success of scaling any business. Core values, core purpose and integrating these into everything will give the largest returns you will ever see as a founder. —David Hauser
3. Noah Kagan, Sumo
Regret: Not connecting with a mentor.
I would have gotten a mentor who's done the things I wanted to accomplish in the future. Why not learn from someone who's already done the things you want to do? People will read this and still not do anything. Instead, send one email to the person you respect in business the most, asking for a chat. You'll be surprised how much it energizes you and helps you succeed. —Noah Kagan
4. Dharmesh Shah, HubSpot
Regret: Not selling sooner.
One of my bigger regrets in my first startup is hanging on to it too long. I ran that company for about 10 years. I had acquisition offers along the way, but the valuations never matched my growth projections. I probably held off on selling that company for three to four more years than I should have. I knew that I was no longer excited about the industry, and had aspirations to do something different—and hopefully bigger. Eventually, I did sell the company, which freed me up to go back to MIT for graduate school—and ultimately start HubSpot. If you're heart's not in it, be willing to make the sacrifice to let something go so you can free yourself up for whatever new things are ahead. —Dharmesh Shah
5. Andrew Warner, Mixergy
Regret: Not asking for feedback.
When I got my first customers at Mixergy, I was embarrassed to ask them why they bought and what I could do to improve Mixergy for them. I thought they were going to tell me that there were too many things to improve because my site sucked. When I finally started calling them, I heard about a lot of things that needed improving, but my customers really liked me and my work, and many of them offered to help improve what wasn't working the way they wanted. —Andrew Warner
6. Wade Foster, Zapier
Regret: Not trying new things in school.
I would have definitely experimented with more stuff in high school and college. Programming, science, selling: I was a bit too shy and nervous about my social image to try different things, and I ended up having some catching up to do. —Wade Foster
7. Adii Pienaar, WooThemes and Receiptful
Regret: Not living in the moment.
I was obsessed about always moving from point A to B to C, which meant I was never really present in any given moment. This also meant that the highs on the rollercoaster ride were fleeting, and the lows, always brutally around-the-corner. I've since learned to enjoy the journey itself (more than the destination) and appreciate small victories and special moments much more. —Adii Pienaar
8. Mike McDerment, FreshBooks
Regret: Not being focused.
In the early days of building FreshBooks, I struggled to find focus. As an entrepreneur, you see opportunity everywhere. It’s in your DNA—your business becomes a hammer, and everything looks like a nail. I could see an infinite number of paths that the company could take. I was fortunate enough to have a good advisor who taught me an invaluable lesson before I managed to killed the company. He said, “Mike, there’s a four-letter word in business: FOCUS. If you don’t focus, you’ll be drowning.” He encouraged me to pick one thing and go as deep as possible… and [to do that] just when I thought it was deep enough, to push harder, because you can always go a hell of a lot further than you initially think. —Mike McDerment
9. Jason Lemkin, SaaStr
Regret: Not picking a committed co-founder.
Never co-found a company with anyone, no matter how talented, that isn't committed for at least seven-to-ten years. It takes that long to build anything that really matters. —Jason Lemkin