I'm a huge fan of the Pareto Principle. Almost everybody, from Malcolm Gladwell to Timothy Ferriss, share my obsession with it. The idea is that a small amount of the inputs are the cause for most of the outputs.
The most productive periods of your life are those where you act crazy. Being unpredictable is a necessary ingredient for serendipity, and it's always those serendipitous moments where the biggest changes in your life will happen. You've gotta shake things up. As much as you can.
If most change comes from being unpredictable, why not embrace it? Make it who you are.
Start doing things you don't normally do. Talk to people you don't normally talk to. Get out of your comfort zone.
You'll be happier because of it.