Always deliver the goods.

Even if who you work for are idiots, and the product is useless. You never know who will see what you've done.

- I did a six-month underpaid project for ShittyCompany.

- Strived to write it nice and clean with unit tests and good(barely) documentation.

- Got a call up a year later from a consultancy company who integrated with the application I wrote. Now I work for them, and it's as close to my dream job as I could hope for.