Well the first time i got aware of one piece was many years ago(7/8 years or more i was a kid im 22 now so.) when it was passing on the TV at 3 am(yes) and it was on the Baroque Works arc, basicly i would watch it but not frequently.
Then i started watching the anime till Skypeia or something i think it was in the foxxy arc or something anyway i started reading the manga frequently since Water seven i believe i remember them traveling to Ennis Lobby in the train when i started reading.
That was the actual chapter haha wich was dumb i didnt go to the chapter where i was actually in the anime but in the same week i started reading everything that was between Foxxy and the departure to Ennis Lobby and catched up to it till now but no i dont really remember the actual chapter.
I also readed all the chapter before where i was in the anime two times one online and i buy the Viz Volumes so i read it again.
I also remember reading manga on msn groups hahaha it was painfull compared to what we have now
@kenjarrettson:
I actually read One Piece chapters before, then stopped. I blame 4kids version for it, but my true first weekly chapter is 454: Hummer. I saw a RAW page scan of Nami against Lola, and the funny line Nami: "I'm a Man!", really had me surprised. Then found out she was just saying that to avoid getting hurt hahaha. So after that I jumped back into the anime and manga, and haven't stopped, yay! 
Sorry you stopped reading the Manga because the Anime was bad in your country dubbed verion? thats seriously dumb.
Anyway i didnt suffer that with the anime since when it first started in Portugal it was subbed, now it just doesnt pass, 10 year old kids think cartoons/anime are for kids nowadays and prefer watching soaps.