My only goal was to start riding my bike to work.
We had a big move in February from TX to CA and only kept one (of three) cars, which my wife uses, so I left myself no choice. So I dove right in and rode to work everyday, unless it just happened that she was driving that way at the same time. Then I might hitch a ride, but that was rare.
I've made a few changes throughout the year, like going from a Northface backpack to a Waterproof Tumbuk2 messenger bag. My clothes have been pretty spot on from the beginning, that only took a couple weeks of riding to figure out. I also made a few bike changes, such as...every single component on it, from headset to hubs, and adding fenders.
I didn't start with any expectation on mileage and I'll end up logging ~2,300 for the year (commuting). That seems pretty good to me.
The biggest factor was not having the option of driving. There's no telling how many mornings I would have been lazy and taken a car if it was a choice.