What mistakes do you see that other clans/players/cps are doing? Share knowledge

[pff2f]

I make this topic so we share our knowledge so everyone can post a tip for other players to improve their game play.

I will make a start:

If you start playing in a new server where the adena is low, etc check this web to see which might suit you best. http://l2.eogamer.com/wiki/Pre-GOD_-_Quest_List_Grouped_by_Town