I've always found that working through ideas in written form really changes the thinking.

Think about how you will start and where you will go. Get the head with logic and the heart with visuals or stories. And think about your core customer and all the other stakeholders as well.

Anything that has low certainty or has a lot of impact should be tested early.

You still want to be thoughtful about what you do, no doubt, but you have to learn through trial-and-error experimentation as well.

You can increase the odds of spotting the weak points in your approach if you really think about the end-to-end business model you plan to follow - how you plan to create, capture, and deliver value.

You can always figure out how to deliver things in somewhat controlled situations, but when you start to get into the reality of the market you start to figure out what isn't going to work.

Not only do innovators have to deal with all of the fundamental challenges of innovation, they have to do so in an environment that often is implicitly hostile towards innovation.