The most important is the dedicated space with a door that closes. So you still “go to work”, just with a very short commute. A few other things that I have found helpful:
- When you're in your office, you're at work, working.
- When you're not in your office, you're at home, not working.
- Work in 48 minute bursts, then take a break.
- Only check email & voice mail during your 12 minutes off.
- Put internet and work on 2 different machines (if possible).
- I prefer radio over pre-recorded music; it reminds me I'm not alone.
- Eat lunch out with a friend several times per week.
- Eat home meals away from your office.
- If you're local, go in to the office once per week.
- If you're not local, go to the office several days per month.
- Dinner with SO every night, no matter what you're working on.
- A regular schedule of sleep, meals, exercise, and work makes things easier.