You're the utility guy.
When faced with a problem that isn't best solved by bashing, the bequiler is usually just about the best there is at resolving it.
Your spell list doesn't have much in the way of combat spells, but it is incredibly flexible with respect to almost everything else - and you cast spontaneously from it.
At low levels, don't neglect your cantrips: Detect Magic is obviously useful, but Ghost Sound, Dancing Lights, and Message are all great given the right circumstances.
At first level, Silent Image is your workhorse. Get creative with it. Later spells will only build on what you can do with illusions.
Mobility: Don't forget that you have Expeditious Retreat, either. The ability to move around the battlefield and do stuff while others fight can be valuable - you might want to make sure you take ranks in Tumble. (Later spells that will help here: Spider Climb, Invisibility, Haste, Freedom of Movement, and Swift Etherealness.)
Face: You also have Comprehend Languages - the first of many spells that will make you a great Face (others include Detect Thoughts, Glibness, and Suggestion).
Lookout: At first level, you don't have great divinations, but you pick some up pretty quickly. (Detect Thoughts, See Invisibility, Arcane Sight, Clairaudience/Clairvoyance, Locate Creature, etc) Combined with Mobility, this can make you an awesome scout. Combined with the Face stuff, you can often gain leverage over people with a bit of info you shouldn't have.
Battlefield Control: You may not be great at direct damage, but you have some great battlefield control spells that you start getting at mid levels. In addition to your illusions, you have various Fog spells, Legion of Sentinels, Vertigo Field, Zone of Silence, Confusion, etc. Similarly, you have spells like Halt and Hesitate - which are awesome in combat. (The problem is that most of these are 3rd level spells - they'll get used up quickly.)
Dispel Magic: You spontaneously cast Dispel Magic. That deserves a category of its own.
-Stuart
