Breaking up (a habit) is hard to do...

What is the difference between a good and bad habit?

1. A good one is hard to start, and a bad one is hard to stop.

2. A good one is undermined by good intentions, while a bad one is what is doing the undermining.

3. A good one may have few immediate rewards, while a bad one usually punishes us somehow.

4. A good one doesn't come naturally, while a bad one takes little effort to maintain because it is a habit...