Ask HN: How would you spend a company provided learning budget?

My company this year instituted a learning budget where they will 100% reimburse me for expenses up to a non-trivial amount of money. I can use this to do pretty much whatever (e.g. take classes online, take university classes, attend conferences, etc...). And this money is use-it-or-lose-it, so it's not like they'll just cut me a check for whatever I don't spend. Just curious what the HN community would use the money for. In particular, I'm looking for things that will actually make me more effective at work as opposed to resume padders. For context, I live in Chicago and work for a trading firm doing a mixture of C++ and Python development. My list so far includes the following, but I'd love to hear the community's ideas: - attending CPPCON specifically with an eye towards getting a better handle on some tools that I'm not as proficient in as I'd like to be (GDB and perf spring readily to mind). - hiring a private tutor to better learn linear algebra and stochastic calculus - signing up for Coursera courses on machine learning Let me hear what you've got.