Every Wizard should have these four wands:
Magic Missle (never misses)
Ray of Enfeeblement (no save)
Silent Image (can duplicate several other spells)
Shield (+4 to AC, will stack with your bracers or your Mage Armor, plus negates your opponent's magic missles)
Total Cost: only 3000gp (750 each)!
Or, 1500gp plus 120xp if you take the feat at 5th lvl.
For another 750 you can throw in wands of Detect Magic and Read Magic, and save your 0 lvl slots for daze and resistance.
Every Megalomaniac wizard should also have these 5 hirelings:
2 Warriors with reach and missle weapons: keep baddies away from boss and plink at enemy casters.
1 Shield Bearer: keep the tower shield in front of the boss, giving him all that wonderful cover.
1 Scroll Caddy: Preferably halfling or gnome, so he can share the tower shield and keep Master from losing move actions fishing out those scrolls.
1 Packbearer/Teamster/Cook/Manservant: Because you are a Wizard and must not be bothered with mundane or menial tasks.
Don't forget your Familiar! It can scout for and will usually have pretty good senses (Awareness!) to keep you from sumbling into ambushes. It can also harass enemy casters, deliver long distance touch spells for you, and can summon help when you've fallen down the well again ("What is it, Lassie!?"). Pick one that give you a bonus to one of your weak saving throws, like Weasel or Rat, don't waste time on one that gives you redundant skill points (you already have plenty thanks to your INT) unless you must have a familiar that can fly.
Might also want to check out the optional Item Familiar rules so your wizard can have his MIghty Staff, One Ring, or Talking Hat:
http://www.d20srd.org/srd/variant/magic/itemFamiliars.htm