A similar strategy is to find things which were invented 10–100 years ago but considered insignificant then, but due to changing environments can be adapted to be useful today in a way that wasn't possible then.

My day job is to work on software working with self-organising maps, which were last popular in 1980. As far as I know, they were never really used for anything significant then. The reason we can be so successful using them is that we discovered a relatively new environment in which they can improve profits fairly immediately: e-commerce.