What did the Buddha say about gratitude?

I'm looking for early Sutras that talk about gratitude. I'm especially interested in if there are lists of things that we can be grateful for, and there are sources that deal with gratitude for lay people. (So far I've seen the [Maha-mangala Sutta](http://www.accesstoinsight.org/tipitaka/kn/snp/snp.2.04.piya.html) , which in the translation linked to talks about "blessings", but in another place ("Old Path, White Clouds" by Thich Nhat Hanh) is translated as "observances", so I'm not sure if it's relevant) Thankful for help and with kind regards, Tord