@maxklein Would love some feedback on a specific case too. The tax-for-dummies book idea has value, but it doesn't fit into the "optimize for time" strategy you advocate.
For instance, while working in tax law for a number of years, I created an annotated Google Custom Search Engine for my own research purposes.
As evidence that it's an under-served niche, the website where it's published was cited by a UCalifornia Law Library and a number of other related websites as a useful resource for tax research purposes.
Besides adsense, how would you generate income for this?