since you just started, putting +5000 WD on your Dagger will help a lot. +5000 ED (Ice, Fire, Poison, Shock, Arcane) will also help boost Damage. lower level items will have lower WD & ED damage, 5000 is for items around level 80+. Items with the ED (Elemental Damage) need to be the same Element as your Weapons, or they don’t get the extra damage. the WD (Weapon Damage) only affects the damage of the Weapon it is on.
+5000 WD on each Weapon and +5000 ED on all 6 Items, each Weapon will do +35,000 damage.
if you are using Quick Attack Skill of Dagger, getting Attack Speed will let you attack more often. +60% Attack Speed is as high as you can go in the early game.
putting Stat Points into Power increases your Damage and for Rogues, increases your Dodge a little bit.
on the Hero Tab, when you get Skill Points from gaining Hero Levels, you can increase the Damage of Quick Attack by 5% for each Skill Point, and also get some other bonuses that improve the more Skill Points you put into Quick Attack.
oh, haha, @ZenX might not be a New Player anymore! his Rogue is probably looting Dungeons and leaving before the monsters realize they are poor again! 