[PF] Stealth Wizard Buildcrafting .... Need Help!

[Craiconn]

For the first time, I'll be playing in a pure Pathfinder Rules Only Campaign (no 3.5 stuff allowed).  My 12th level Foresight Diviner Wizard (with Forewarned, Prescience & Foretell) is going to the party's only arcane spellcaster.  So I'll be doing standard debuffing and BC work for the group (a ranger, inquisitor & cleric).

As a dedicated sub-theme for my wizard, I need to spend at least some of his build resources on "stealth" capability.  As all 4 of us will be needing it in order to survive this Underdark-centered urban campaign (lots of espionage and sneaky commando missions).

So I'm hoping some of you folks can help & recommend to me some magic items, mundane gear, spells, feats/traits and the like for me to look into.  Please note, I'm not looking for a full-throttle investment into stealth capability.  More so a less-resource-intensive or auxiliary investment.  In essence, I'm looking for "stealth on the cheap".  To note, I will be maxing out my Stealth and Perception skills, even though I won't get the bonus +3 for doing so. 

So if you can help me find some great "bang for the buck" stealth ideas - I would greatly appreciate it! 

P.S.  Any ideas for spells would be best for long-durationed spells so my wizard can hopefully get at least 2 or more of his 4-5 combat-encounters-per-day (which we are expecting) properly covered.

[Keldar]

Slippery, Highlander, Silent Hunter and Bandit traits can all make Stealth a class skill for you and give a +1 trait bonus.  Dim Seer, makes Perception a class skill.  All are regional traits but Slippery.

Ghost Sound and Prestidigitation can be useful for Obi Wan Kenobiing your way past a pair of Stormtroopers.

Silent Table looks handy.

A Cloak of Elvenkind gives a cost effective bonus to Stealth.

Otherwise, remember that 10 feet of distance increased the DC of a Perception check by 1.  Meaning put the noisiest people furthest from likely trouble.  Absolutely free!

[Craiconn]

Thank you, Keldar (I voted up your post).  There's some good resources in your list.

I realize that stealthing around in PF is a little more complicated due to the high Perceptions scores of nearly every single creature.  That's why I'm looking for as many cost-effective edges I can find .... while still being able to do my expected "other" duties as the party wizard.