Your happiness is at the intersection of your passions and learning from great people.

Nothing helps make a leader more approachable than admitting your struggles, screw-ups and behind-the-scenes thinking on hard calls. If the leader makes this a priority, the whole company will be more open and methodical learning from failure.

Working at a big company sucks - avoid it. Smaller companies are 10 times better for learning.

At the core, coaching authenticity is complicated - some might say impossible. Telling someone to be authentic sounds pretty low calorie, especially to a founder plowing through a list of product and operational goals. But it's important.

To me, success in the job is setting a vision, guiding an organization through change - which is exactly what I did at Digitas, and I'm very proud of that - and bringing people together and with you. That, to me, is what it takes to be successful.

We've been publishing the TechStars data fully since the beginning on TechStars.com. For every single company, you can see if it's a failure, success, how much they raised. Entrepreneurs deserve that sort of transparency from accelerators, and it's not hard to do.

Long hours don't necessarily mean success.

If not for the success that medicine has made, I might be part of a much different story right now.