Next time you're reading and you come across a fascinating tidbit, interesting quote, or useful statistic, just highlight it.
Hylyt.it relies on the findings of several studies to remind you at optimal intervals when to reread your highlights. The fact that the reminder intervals follow an exponential function means that you won't be bogged down constantly reviewing old material.
Hylyt.it can do this and a lot more. Tag highlights by theme, turn off or increase the time between reviews, add notes in the margins, and more.