A very smart use of Twitter to increase sales

Yesterday, I commented on my Twitter Feed that I often seem to have my most creative ideas at strange times, my tweat was as follows:

why do my most creative ideas come at odd times? usually when in the shower, but tonight whilst brushing my teeth...

That was at around 10pm, when I woke up the next morning, I had a DM from someone called @ShowerThinker offering me a product called Aqua Notes, waterproof paper and special pencil to stop your ideas from going "down the drain".  This is a great example of using the massive stream of data within Twitter to search for terms relevant to your product and see what people are saying, it could be feedback or as in this instance, expressing a need for a product I didn't even know existed.