I found many of my info by Ancestory, Rootsweb.com and LSD websites. Yes you have to be really careful who you research because it can lead into a wrong path of a wrong ancestor.
I am some so distant "cousin" of Princess Diana which we do have the Spencer family on my dad's side.
I was having difficulty finding my ggg grandfather who supposely came from Paisley Scotland and trying to find him is like a needle in the haystack. UGH! Royal blood, I dont know but one I do know for sure was from Fife, Scotland waaaaaaaaaaay back in the Jacobite rebellion before he was "imported" to US.
I did subscribe to Ancestory for a short period of time as time permitted. Most of the time its during the winter months while daughter goes to school is the only time I get the time to research.