Today I ran 2km at 6.4 km/h with an incline of 0.5. For American readers, a mile is about 1.6km so I did 1.25 miles.
And I really enjoyed it! Even though it was just on the treadmill and no uphill, it was still really fun and amazingly easy. Most exercise bores me after the first 5 minutes but I was on the treadmill for nearly 20 and look forward to more next time when I'm feeling even healthier.
For some great tips on running technique check out running.about.com. I always found running really intimidating but it turns out even someone with my mediocre fitness can get through a small jog!