A Precor?! You are so lucky!!! Those are the best, in my opinion.
Great results on the elliptical? Hm, I lost 122 pounds in a year using an elliptical as my ONLY cardio. And it's what I still do every day to maintain my loss.
As for pointers, the biggest mistake people make is to push with their toes instead of through their heels and then they end up with plantar fascitis and other injuries. Think of the power coming from your
heels. Use all the incline and decline settings to work different muscle groups and go forward and backwards. Then once you're comfortable on it, start throwing in sprint intervals that really elevate your heartrate. Interval training is much better for fat burning than steady state cardio.
And have fun!