If you have dial-up which I had till a few months ago, use the hardcore builds, and play softcore. You will come to a point according to how well built your character is and how good your items are, that It will be very difficult to level up could be from 80 to 97 depending.
Also get used to playing solo, as you will actually see items drop that way,
otherwise you will wonder why nothing falls, and your ping is better too.
On a cherfull note, It was very funny to play with my friends, they on dsl me on dialup, after lag hit their uber chars were dead and my pindly weird build was still holding the fort.
Also take care of your merc they are vital for your survival as they do not suffer lag
After my best friend used my characters, he adquired a new respect for mercenaries, and now takes care in their planing and equipment.
Cheers