At first it didn't really make sense to me. I don't want to make mistakes tomorrow. The idea that one mistake is better than another is just weird, they both suck. I thought about it for a little while and here is my interpretation.
If you aren't making mistakes you're not pushing yourself which probably means you aren't learning. Now that doesn't give you an excuse to not think through decisions, that's just well.. stupid. Those are bad mistakes. Better mistakes is understanding that when you're trying to do something truly original, something that will fundamentally change the way people do things, you're going to make mistakes. Lots of them. Whatever notion of "a lot" you have in your head right now isn't enough.
You can look through every piece of information, think through every scenario, ask the smartest people on the planet and you're still going to be wrong sometimes. The trick is to not get discouraged, don't let that fear of making another mistake scare you, learn everything you can from them.
That way you won't make the same mistakes tomorrow, you'll get to make better ones.