Assume you have 90 seconds with a new user before they decide to use your app or delete it.

In preparing for battle I have always found that plans are useless, but planning is indispensable.

Failure defeats losers, failure inspires winners.

Most 'impossible' goals can be met simply by breaking them down into bite-size chunks, writing them down, believing them, and then going full speed ahead as if they were routine.

The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.

What is not started will never get finished

Fall seven times and stand up eight.

Example is not the main thing in influencing other people; it’s the only thing.

How you climb a mountain is more important than reaching the top.

I have not failed. I’ve just found 10,000 ways that won’t work.

The successful man is the one who finds out what is the matter with his business before his competitors do.