You can't be passionate when you feel like it. You have to be passionate about your job, product or cause all the time. There's no off switch on a tiger.

I've known entrepreneurs who were not great salespeople, or didn't know how to code, or were not particularly charismatic leaders. But I don't know of any entrepreneurs who have achieved any level of success without persistence and determination.

You only get one chance to make a good first impression, and yours may be in the hands of the receptionist.

All success is, really, is having a predetermined plan and carrying it out successfully over a long period of time.

Optimists are right. So are pessimists. It's up to you to choose which you will be.

Pale ink is better than the most retentive memory.

Decide what your priorities are and how much time you'll spend on them. If you don't, someone else will.