A new gift!

On Friday I was gifted with a brand new Keurig coffee maker. I've heard so many great things about these and I'm eager to give it a try. The gift did not come with any coffees, though, so I went online to take a look at ordering some. Wow! So many choices! Coffees, teas, hot chocolates! And so many cool flavors and varieties. So now, I need some help. If you are a fan of Keurig, can you let me know what your favorites are to buy? And if you know of a good place to get a great deal on the K-cups? Or any tips or suggestions about the Keurig machine? I'd love your advice! Thanks so much!