Inspired by this, I've decided to do two things:

1. Quit biting my fingernails
2. Quit drinking caffeine

The first I've been doing as long as I can remember (20 years or so). The second was introduced in university as a sleep control agent. I don't know if I'm really addicted to either, but they are undesired behaviour nonetheless.

I'm going to use the same background tick-marks, except I'm going to put them on this blog. They give you a reminder every morning of what you want to accomplish. Since mornings are one of the typical times of day I drink caffeine, this will be a handy reminder.

The first habit will be harder to quit. Sometimes I don't realise I'm doing it until I rip the top of my nail half off. It has become an entrenched habit. Only a counter-acting entrenched habit (and will power) can overcome it. I consider it to be a personal challenge.