What do you do when an outdoor cat doesn't come around?

Make flyers for the local shelters and animal control. If you find her keep her indoors. Unfortunately I have never heard of anyone finding a cat that has been missing that long. Good luck - I hope she is an exception to the rule.

Contact your local shelter. They may have her.
Post flyers and offer a reward if you can.
Talk to your neighbors, your mail person, newspaper delivery person and anybody else out and about in your neighborhood.
Talk to the kids in your neighborhood. They might help search.

Good luck.

I'm sorry to come across mean, but this is what happens to outdoor cats. In the last 6 months I have seen about 6 dead cats in the road.

If you find your kitty (which I hope you do), you should have it microchipped and keep it indoors only.

you should look around the neighborhood and even ask some neighbors to see if they have seen her. If you really want to get her back try setting a humane trap outside and placing food inside to see if you can trap her. You can buy one or rent one from a local animal shelter

The first thing you need to do is contact your local animal control and any humane society or shelters in your area. Give them a description and you phone number so they can keep an eye out for your cat in case it turns up there. Most people dont think to get this info to these places first for some reason. A lot of shelters and rescues will help post flyers and pictures on their web sites for you too I know our group does. It is always better to have more people involved in looking for you lost loved one.