Make the choice
It's become cliche - if you want to become a runner, don't buy running shoes, just start running.
If you want to be a writer - don't wait until you have a Macbook Air and are sitting in a coffee shop with a perfect idea - start writing today, right now, on your junkie old Dell laptop, or even with paper and pen.
It is simple. And, I also think this same idea can be used towards becoming the person you want to be.
If you want to become a better dad, pick something to improve on and do it - today, not tomorrow. Want to get to know your kids better? Ask them how their day was, and really listen to their answer, and then ask questions about it. You don't need to read a book or take a class to or wait for the perfect timing - just make the choice and do it.
Want to be better at handling e-mail? Figure out a process and start handling it better, right now. Wnat to be more positive? Make the choice to be a positive person today, and be positive. That's it - make the choice.
Make the choice to be the person that you want to become. I've come across several blog posts that put it a little bit differently, but offer the same advice...
And the change can be big or small. It can be in one area of your life or all areas of your life. Just start deciding who you want to be and then start acting like that person. Make the choice.