Add in a separate notification system 48 hours before the crimson tide is due to start, and maybe hook it up to another API that auto-purchases and delivers chocolate to your house -- or work a purchasing deal with one of the many "period box" delivery companies that have sprung up lately (see http://pregnancy.about.com/od/Menstrual-Cycle/tp/Box-Subscri...).
Of course, this API would only be usable for 50% of the population at best, and likely only for ages 12-45 within that 50%, but that's still a pretty big potential market. :-)
When doing interesting and fun things you could increase your attention for details by lowering the filter level for visual input, so you can remember it better later on.
Searching for your dog? Crank up your hearing.
Coworkers have to talk about private stuff again? Filter it away.
Morbid? Maybe, but it might help solve my death, and my data would also be available for research.
Automated data entry and feedback on weight loss and management would be great.
Eyesight.Pupil.Dialate(DilateByTimeofDayEnum.LateEvening);