The biggest mistake people usually do is taking the wrong stats. To avoid this you must know what class you will choose when you start out. Then raise stats according to your class. Reminder Warrior = STR Mage = INT Bowman = DEX Thief = A STR (30%) DEX (70%)
On Beginner island you MUST complete all the quests and train on monsters. Why? So you get out with lvl 6 or more so the bigger monsters don't kill you every time you try to get some exp. It's a big mistake too.
Pick up items! Yours or not, if you can, take them. If you do it, after selling them you will get your first 100k in a few levels. Don't waste money on potions and stuff, heal the good old way - by staying still or sitting on a chair.
Don't beg for items, money. NEVER buy quest items, only buy equipment. This way you save money and get exp by killing monsters for items. Of course if you are tired and still didn't get the item you needed, you can buy it, but only if you have a lot of spare money (buying lvl 20 equipment costs somewhere near 120k, so watch your mesos).
Allways check what you will do. How to get there. What will you kill. The best guides are in www.hidden-street.net . Here you can even find guides on how to become a better thief, warrior etc. Remember to always think about the future, and you can become the top mapler.
