Allan Hirt's Mission Critical SQL Server class, multiple SQLSaturdays, Pre-Cons at those events, hotels, meals, gas...a little over $5000.00 this year and almost all of my vacation days.

Between books, PluralSight, an SSD, and RAM to upgrade an old laptop about $700.00.

I can show you the itemized list at the Lincoln SQLSaturday if you're interested.

By the end of the year, total will be a little over $6000.00. All of it is out of my own pocket; But it's an investment in my future as a DBA.