Scripting (Java, R etc)
Scripting means being able to move beyond the custom formulas available in Excel, to create ones own computing routines and applications, specifying every step with a line of computer code.
This can be a particularly good skill to learn the basics of, if you have large data tables as a part of your project. You don't need to study an entire programming course to be able to get started analysing your data. I can teach you the basics that you need in a few lessons.