Poo-Pourri
I use Ozium. That stuff works like money! 100% But you spray it afterwards - and then you shut the door and run like hell.
I'm going to try a little spray in the bowl before hand to see what it does. I normally don't hang around once I spray it because it feels like it sucks the air out of my lungs. Any one ever try this?
One more that has been recommended on these forums - Pure Citrus Orange Air Freshener. It can be found at Wal Mart, CVS, and other common places, although I grabbed it from Amazon. It is made from Orange Oil, so it, leaves a fresh, citrus scent, and does a great job blocking our odors. Stick with the orange or tropical scents.
One nice thing for Poo Pourri is that they have pocket and purse sized versions, good for when you need to go on the go!