I started with the 4kids dub and read the U.S. Shoenen Jump through the Don Kreig arc. Around the end of Kreig arc(on the Saturday Morning run of One Piece in May 2005) I jump to read the scanations of the start of the Arlong arc and up, since I couldn't watched the Japansee run of the series right then since I didn't have my now DSL internet.
It took me from May of 05 to like Mid-November of 05 to catch up to the manga. When I caught up to the manga, it was right when the Straw Hats got to the Tower of Justice in Enies Lobby and Robin's flashback begin. And now days I read the manga everyweek to be updated about the adventures of the Straw Hats.
During this time, while I was reading the manga I was getting less torelate to 4kids dub of the series. So when I got DSL internet and got my laptop. I begin watching the japansee episodes of One Piece. The first japansee episode that I watch was episode 254, which was the episode when Nami and Chopper went to save Luffy and Zoro from their sticky situation being stuck. I didn't start watching the anime from the beginning until like a month or two later after that.
During that time I watch the beginning stuff from K-F, which I didn't caught to them until they begin the Davey Back Fights, and I started watching the Water 7 arc from beginning to the current events of the anime.
Currently I'm rewatching the episodes in order as Funimation release their dub of the series and I'm planning to buy every release of the Funimation to show them support of the series, and to me they are doing pretty much every thing that I enjoyed. And again I want to thanks Funimation that they save this great series and they are giving the series a proper treatment unlike 4kids were doing.