Ideas are usually born from some insights. Google founders' insight was their PageRank algorithm. They realized they could sort the web by their link popularity. The more incoming links a page has, the higher it ranks. For Showtimes.my, the simple insight we had was to deliver what the user wants (showtimes) in the fastest possible manner. This meant showing all the movies that are shown in your area at once and format the showtimes nicely so it's easier to read.
Obviously, the better the insight, the better idea will be. So far, most of our ideas are developed from rather simple and common insight. Hopefully, one day we'll have some rare insight to a problem and build a solution for it.