I use it to help write proposals sometimes. I can prompt it to compare/constract two technology providers and that gets me started writing. It's never a perfect fit but it helps get the creative/sales juices flowing.

I also use it for searches when i know the specific documentation i'm looking for has to compete with SEO spam. It's also pretty good at explaining code, i've pasted in some snippets of code from languages with snytax i'm not familiar with and ask it to explain what's happening and it does an ok job.

i also like to use it for recipes like "create a recipe for chicken and rice that feeds 4", "make it spicier" etc.