Dopplr's CEO LIsa Sounio recently made an interview that's now published here:
http://www.pestaola.gr/lisa-sounio-dopplr-ceo-interview/
It's an interesting read, and gets into the "entrepreneurial spirit" pretty fast there. She gives some rather good advice:
(quoted from the article:)
Top 3 tips for entrepreneurs
1. Go ahead even though the idea is not fully clear, you learn
2. Figure up your strengths and complete your weaknesses with excellent partners
3. Small can be beautiful and faster than the elephant
Top 3 mistakes you did but never repeated again
1. Always respect people although they would not respect you
2. I was so afraid at the start, for no reason!
3. Don’t worry for competition. Keep your eyes open and help others as much as possible
That's nicely compressed excellent stuff. Having seen Lisa work from up close I can say that she also does practice what she preaches. Also note how the Finland promo sort of leaks through from the article ;) She's really good at that.

Pic: Me and Lisa "Dopplr Posin" at Dopplr offices. Photo by Matt Biddulph.
It's a picture meme imitating the original photo here.
Listening to Lisa and myself speak about entrepreneurship I'm starting to get the feeling that the proper attitude for success is more and more about something that can be described as "faith". Faith in yourself, in your idea, in your team, etc. Being a successful entrepreneur seems to require courage, faith and some level of stubbornness ;)
Hi. My name is Taneli Tikka. This is where I preach what I practice. I'm a
serial entrepreneur and a startup activist of sorts. People usually know me
from my past and present consumer Internet service projects: IRC-Galleria,
Dopplr, Muxlim, StarDoll, RunToShop, Vakuutuskone.com, and a bunch of other stuff. My
"proper" bio is behind this link. Glad to see you here, thanks for browsing
around.