Automatically detecting website changes
Recently I wanted to automatically get a notification when a new rental property was added to Rightmove. I began by using their built in notifications which initially worked quite well, but I still found myself manually checking the site as those updates only came every 24 hours.
The solution? As with many web-based automation tasks, I turned to the much loved ifttt.com. However initially there is no way to detect changes. To do this you have to team it with a third party site; I chose to use page2rss.com.
Page2RSS does what you might expect from the name, and makes a feed out of any site. This can then be used with IFTTT's Feed action to notify you when it changes.
Sadly this still isn't quite real time, and I suspect with a different choice of third party site that could be improved upon (although how happy that would make rightmove, I don't know..). But this served my needs well, all without having to make any additional accounts