I'd spend it on something that helps your mental health. I worked in a very dreary office under a lot of stress for a long time before I realized I could change my environment. I'm still doing the same work with the same equipment, but the walls are a color I like. The desk is comfortable. I have green plants to look at, and nice things on my wall. I have funny action figures on my desk. I spent my time and energy making my workspace nicer and it makes dealing with workspace stress a LOT easier.