a few things you can do with a familiar...
1) Scout/Spy (who bothers with a sea bird circing near the sea shore.)
2) Use it as a messanger. (have it carry a letter.)
3) Deliver Helpful touch spells in combat.
4) This creature shares your skills... So your DM may allow it to do an "Aid Another" action on all your skill checks.
5) There are a bunch of familiar enhancing spells in the SC and other secondary books, you may want to consider them...
6) They can move small objects (potions, scrolls, keys, a dagger, etc.) to different characters when you are either busy (combat) or held prisoner.
7) Dive bombing runs in combat (Tanglefoot bags and Holy Water seem to work well)
If you have a cleric in the party:
8) Have them use Imbue with Spell Ability on it to give it some helpful spells. (Note you will need the Speak with Master ability to use Verbal components, and you will have to deal with the lack of hands for Somatic components.) I had a dragon familiar that saved many a character from Death by simply flying in and dropping a cure light wounds when the party cleric was busy.
And of course there is my favorate:
9) They can take out other wizards familiars. (Yes, nothing is more fun then seeing the enemy wizard suddenly lose his most powerful spell because your Bird just ate his toad....)
