For sorcerors, you take Metamagic feats like any other feat. Remember that for Sorcerors, and other spontaneous casters, applying the metamagic feat extends the casting time to a full round action, meaning you get no benefit from the Quicken Spell feat.

If you are going to be a Metamagic dude, you can negate this penalty by taking Rapid Metamagic from Complete Mage, with a prerequisite of 12 ranks in Spellcraft.