My sister carved this for me with a laser! Isn't that amazing? (Yes, that's a wooden Kitchen-Aid charm.) There are so many things that I want to learn someday, not the least of which is wielding a laser cutter.
For now: managing time better (if I write out an hourly schedule for myself before the day begins, it helps keep me on task), using Adobe Creative Suite (you can learn any program ever with Lynda!), keeping a grocery budget (requires planning the week's meals in advance; here's a simple planner), giving compliments (a lifelong endeavor).
What else are you working on mastering?