OnePiece

East Blue Saga

1-4 Zolo / Captain Morgan / Intro Arc-
5-8 Nami / Captain Buggy Arc
9-17 Usopp / Captain Kuro Arc (Syrup Village)
20-30 Sanji / Don Krieg / Baratie Arc
31-44 Arlong arc
46-47 Little Buggy's Big Adventure
48-53 Louge Town arc

filler

54-61 Apis (side arc)

Baroque Works Saga

61-63 Laboon Arc
64-67 Whiskey Peak arc
68-69 Coby-Meppo side story
70-77 Little Garden arc
78-91 Drum Island arc
92-129 Alabasta arc
130-151 filler
152-194 Skypiea Saga

filler

195-206 G8 Marine Base
207-219 Davy Back Fight (Long Island)
220-224 Lost Memories

Shipwright/Nico Robin Saga

225-228 arc intro
225-226 davy back back
229 - Water 7

235-236 - fast forward time, stupid usopp. in fact you can completely skip ep 236