There are 2 different searches you can do
gallery-click on gallery at the top of the homepage and search for pics that have been uploaded by entering keywords (such as Halloween, gift)
forums-click on forums and then search a few words. Click on "search for ALL terms" so you get them both in on message. Previous threads that include those words will pop us and you can browse from there.
Incidentally, from the forums here is a link you may want to check for Halloween ideas.
Forums at Splitcoaststampers