Things you need to create your own geocache:
Geocache logbook: So people can sign in when they find your cache
Geocache Sticker: To stick onto your container in order to identify it as an official geocache.
Geocache container: in case you want something taht looks a little more official than kitchen tupperware
Now you simply need to create an account at www.opencaching.com and get your hands on a gps device (many phones will work). Find a nice place to stash your cache (don’t forget to label it with a sticker and put the log book inside along with an item). Log the gps coordinates along with description so people can hunt for your cache. Please read rules and etiquette at www.opencaching.com.