I've had amazing luck using Ancestry.com. I have been able to follow my family tree all the way back to the 1600's in Denmark. Check to see if they are still offereing a free two-week trial. If so, start by entering the name of the oldest relative whose name you know (great-grandmother, etc) and any other info you have. If you're lucky, you'll get a hit and maybe find a family tree already done for you. At worst, you will learn a bit about geneology and that can't be a bad thing.