Choose a time of your life--childhood, middle school, high school, college, etc--and create a time-capsule post to share with your readers. Include anything you like--favorite books, favorite authors, favorite series, favorite genres, favorite songs, favorite albums, favorite musicians, favorite movies, favorite tv shows, favorite toys, favorite games, favorite styles, etc. You can make it as general--or as personal--as you like. If you're brave, you might even include personal pictures! (Though that is NOT a requirement!)
If your focus is on books, on reading, perhaps you'd like to mention if you've ever reread any of your 'favorite' books from this time. And if you have, what did you think? Have you out-grown any favorites? Or do you love them still? What do you think makes a book timeless or dated? Perhaps your favorites are out of print, which ones would you love to see brought back into print?