Well, as they say learning never stops. So for personal development, I make it a point to learn something new every year. This is typically consists of a series of short, medium, and long-term goals. This year what I wanted to learn is how to be more knowledgeable in GIS and RS tools. Next year, while I plan on being more versed in this field, I will set a goal to learn cartography.
For other self-improvement goals, perhaps I'll learn how to swim or do something to conquer my fear of heights.