It's 2019! Woo-hoo let's get after it! Let's slow down there cowboy.
The reason most people burn out so fast in their New Year's resolutions is because they try to change everything all at once. Play the long game, not the sprinting game. It's ok to mess things up. Just because you mess up once doesn't mean it's over. Course-correct, get back on the horse and keep going!
