For P2P runescape players flax picking is a very good way to make money ( and even get a little crafting exp ).
The the only place to flax pick is at seers village.

1.Start at the bank and make sure that you are wearing nothing except boots of lightness, penance gloves, spotted cape, or spottier cape. (They all lower your weight)
they all lower your weight. Also have nothing in your bag.
2.Next put your run on and go to the flax field.
3.Pick 28 flax.
4.Then run back to the bank and put the flax in your bank and repeat step 2 untill satisfied.
5.When satisfied go to varrok and sell then at them ge for a GREAT profit!
ORMy Flax to Bowstring Guide
http://forums.rsbandb.com/viewtopic.php?f=66&t=72604