Stratagies!

 
 
This is stuff that is useful for starting player:
1. When facing a group of monsters, lure and engage them in a narrow doorway, so that you only need to fight one monster at a time. 

2. Get your items repaired or recharged in the town, because doing it yourself in the dungeons would cause the items to lose some of their full potential. 

3. Save your game before stepping up to any of the shrines, because if the effects of the shrine turn out to be undesirable, you can reload your game. 

4. Because some of the barrels are booby-trapped with explosives, try hacking it open with one of your spare weapons, instead of risking the durability of your main weapon. 

5. If there are monsters in the next room separated by a wall with barred windows, use arrows and ranged spells to attack creatures through the barred windows.
 

What I do is I go down to a certain level and when I finish clearing out that level and the one's above it I go back to town and I pick
up all the stuff I am going to sell and I go sell it. Then I pick up all of the rest of the stuff and save the game. After you save the game you go to the screen where you choose the player you want and choose the same guy you were just playing with an d click on him and when it says Load game or New game. Choose new game. When you arrive in town you will have everything you had in the previous game.You can do this as many times as you want. But there is on problem, I tried this when I had Arkaine's Valor and I looked in my inventory and I didn't have it. So if you have the valor sell it and pick up some other armor.
How to get Unique Items (lots and lots):
(You need to be fairly high level for this, like 30+ to be safe). 

Get a mage, enter hell on normal difficulty. Until level 15, keep casting teleport to quickly find the stairs, then go down. If you see a boss, stop and kill him, otherwise just get to level 15 as quickly as possible. Then teleport to the upper left corner of the map(top of the diamond), and go into the Lazarus Room. Trash everything in there, then search the corpses for unique items or any decent magical items. From there, go around the level and find bloodlust and kill her, then go downstairs, find Sir Gorash, toast him, look for items on his corpse, and then hit new game. (Killing Diablo and sitting through the ending sequence takes too much time.)
 

Kurzock 
One good idea when you're outnumbered is to lure things out one at a time. Monsters seem to have different aggressiveness levels almost, and some will be drawn out when a certain distance from you. Attract the bolder ones, and waste them one at a time until you hit a more manageable number. 
Another thing that I have noticed is that sometimes the AI is screwed. Monsters won't attack you sometimes or run away if you don't click the cursor on them, but near them. Did that and got close enough to some Goat Clan boss to practically breathe on him. : )

Here's one thing I wish I remembered to do more often. If you're adventuring somewhere that's a bit too tough for you, cast a town portal as soon as a horde starts running your way. That way, if the monster-bashing gets too tough, you can dive through the portal. Less reaction time required, and no need to worry about running out of mana and being trapped away from the stairs up. 
 
 

I'm sick of all this "King's sword of Haste" as the best warrior weapon crap! Think about it. The warrior's weakness is many monsters at once or archers/rogues. So how about a King's staff of apocalypse or of nova or of fireball or chain light or stone curse?! Does more normal damage! Almost as much as a Maul. You give up a shield but you're more flexible and offensive. I have bountiful staff of fireball with 225 charges! That's enough to clear a level!
Bottom line: staves are underrated. Even for mages. Use a staff to cast spells and save the mana for synthetic hps! Apoc staves can kill monsters behind walls. Killed Diablo without opening the levers. just nuke him from safety! Mass exps this way.
 
To date, only one of our characters feels no fear when faced with a pack of dogs that stays at a distance and pounds you with acid, poison, or lava: the Sorcerer. A Rogue can slowly pick them off if she can get a clear shot from outside their range (and thank the gods, they have limited range), a warrior without armor of Deflection and a sword of Blood is going to get worked over pretty badly, but even a relatively low-level Sorcerer can throw off Fire Bolts and Lightning spells quickly enough to wipe them out in at most a minute. A high-level Sorcerer with well-pumped spells needs only a few seconds to clear out even the largest pack with Fireball or Chain Lightning.
Just wanted to let you know there is another great use for telekinesis besides springing traps. I use the spell to open doors from a distance when I know there are monsters behind it. At the Chamber of Bone, there is a room full (and I mean FULL) of skeleton dudes and 'Hidden'. I lay down two flame walls outside the door, perpendicular to the door. I then open the door from a distance with telekinesis. Then I listen to bones and flesh popping in the flames while they try to get out to me. If I wander back and forth parallel to the flames, it draws all but a few monsters out. Great fun.