1. Download this free program called TrayIt http://www.teamcti.com/trayit/trayit.htm

2. Open Poker Tracker and set it to start importing hands regularly

3. Use TrayIt to minimize PT to the system tray so you're less tempted to look at it every 5 seconds

4. Go to the task bar properties, click Customize... in the bottom-right corner and set it so that the Poker Tracker icon in your system tray automatically hides (the less you see it, the less you'll want to click it)

5. Proceed with poker and check your stats and results at the end of sessions only (or less often than that if you're a more established player)

6. Profit

Edit: Yes I know there's an option in PT to minimize to the tray, but there's more information here and a more important meaning than that.