The biggest hurdle for me was overcoming my feelings:

1.  I didn't know enough about the parties to make the "right" decision

2.  That I should just let the "adults" deal with it since I was clueless.

I eventually came up with the conclusion that there wasn't a right and wrong party to vote for.  I also tend to be paralyzed with indecision, so I decided to chose how I would change the world for the better if I was the Prime Minister and chose the party who supported this.  After I did that, the decision was easy: the Green Party!  I also knew that there was a party that I didn't want to win, so any vote that was a point away from them winning was okay in my books.

I should clarify that on my next birthday I will turn 30...so I guess the feeling of never really being a "grown up" never goes away.  I had to face the fact that it was bullshit excuse and if I still don't feel like an adult, then I'll just have to fake it 'til I make it.

I also started thinking about how there are people around the world that aren't given the chance to vote because their government isn't elected, or they live in a country where women are strongly pressured not to vote or even face extreme violence and hardship when they make use of their right to cast their ballot.  This was a good motivator.