How To Kill Diablo Easily With A Sorceress:
Once you unlock all of the seals go to Diablo and use 'Static Field'. Static Feild will kill him very quickly if you're at a high level. It also works on mini bosses.
-Need 2 computers and 2 CDs: Find something really cool or expensive. Copy your character (found in save directory) to another computer. Start a multiplayer game using your copied character. Join this game with the other computer and you will be able to copy items you already have by trading with yourself.
-After you complete the 5th quest of act one (The one given to you by Charsi) it is better if you wait until later in the game to have her imbue an item for you, because later in the game you can get better weapons and armor, and having her imbue one adds 3 - 5 magical attributes.
-If you play Multiplayer on Battle.net Click the blue Crystal in the center of the screen and it will turn Purple. If you look at the text box it will say "Gem Activated" Then start a game or join one and you will find at least one Gem shrine and if you have a Gem in your inventory it upgrades it.
-If you can't find anything good to buy all you have to do is leave town and come back, everyone should have all new items for sale.