Wow...where to begin:
Well first we use iPads at school in almost every class. The educational uses are incredible, from textbooks to testing, from research to collaboration. I carry two of my textbooks on my personal iPad. Th Khan Academy, a free tutoring site, has a free iPad app.
Communication on the iPad is phenomenal. Facetime, Messenger, Facebook, yahoo messenger. Skype, YouTube, and of course Safari to stay plugged in here when away from computer. All of the communicatin biggies are free or pre- installed.
Must haves for me: iPhoto, Flipboard, Kindle, USA TODAY, Google for iPad, Pages for Word compatible word processing, Star Walk for stargazing / astronomy, My Xbox Live like having your Xbox with you without the game play, HBO Go access to all On demand content if you have HBO, GarageBand...can lay down music ideas and drop them into my studio software seamlessly, GAMES? I carry three. Angry Birds, Temple Run, and Asphault 6 my favorite driving game.
Checking out the free stuff is an absolute must. Lot of it great, some of it is crap, but it's free crap.
Warning: Get the biggest iPad you can. I got the 16 gig, and with all the multi media content in apps etc., I'm constantly swapping stuff out for space. I have over 4 gigs of music alone, 25%of my capacity, not good.
Once you have the apps to fit your lifestyle and needs, you will quickly find your iPad indispensable. It can be so much more than a game platform. Entertainment, communication, productivity, research, creativity, all with high level tools for each in one device. You'll love it.