Brain Bump lets you access top tips from authors, podcasters, bloggers and other content creators. You can add sets content (e.g. from a book) to your app and then set when to get a reminder of it. Think of a daily affirmation but with the useful, actionable advice you want. You can also search through the content to find the advice you want, when you want it.
It combines the best functionality of flashcard apps and book summary apps, but requires less effort on your part than any of them.