Best way to get from airport in rome to tiburtina

Of course, first question is define best - cheapest, quickest, fastest, most convenient???????

Beth,
See http://www.trenitalia.com/cms/v/index.jsp?vgnextoid=f12f3bf7c819a110VgnVCM1000003f16f90aRCRD FL1

There's a train that runs about twice an hour from the airport (same station as Leonardo Express) to Tiburtina. Takes about 40 minutes and costs about 8 euro.

We took the train that Frank described and had no problem. We did have a slight problem finding the bus station. We were taking the bus to Siena and the station is just a parking lot with some small offices for the bus companies and even though we had seen it on google maps it was a bit confusing in person.