First off, go here and download gamebooster.
Then, watch the videos on youtube:
Lower your ping
Disable Nagle
DarkSen's Channel - Guides are pretty good.
Remember to turn on gamebooster after downloading.
EDITO: Also, get windmill all the way to rank 1.
Free rebirth to 17 so you can rebirth every three weeks. 'Tis what I do.
And to get your dex up, you rank life skills. Refine first, metallurgy while ranking refine, production mastery and weaving. The dex may not be that good but the possible profits are good. Rank 6 Metallurgy with about 15 sieves combined with Rank 1 Refine and Rank 1 Production Mastery = A solid source of iron ingots, 30k per stack on Tarlach. rghosts is buying them so she can get to Rank 5 Blacksmithing so you can make money off that if you want to. Chances are, you'll make a good profit while windmilling the zombies for Rank 1 windmill. I made around 700k from the ones I killed for Rank 2 and Rank 1/Master requirements.
Let's review:
Download gamebooster
Watch youtube vids
Free Rebirth to17
Rank up Windmill to rank 1
Rank up Refine and Metallurgy (+36 dex and + 4 dex [Rank 6 cap])
Rank up Production Mastery (+17 dex)
Rank up Weaving (+43 dex)
For ranking weaving, get ready to start buying or hunting leathers as well as getting upgraded gathering knives and spending hours (upon hours waiting for cobwebs in a white spider area)
Cheap Leather: Ciar Normal (Goblin/Goblin Archer/Poison Goblin)
Common Leather: Math Normal (Kobold/Kobold Archer/Poison Kobold)
Fine Leather: Math Normal (Kobold/Kobold Archer/Poison Kobold)
Finest Leather: Sen Mag (Bears)