Rav Avigdor Miller made thanking Hashem publicly into a more mainstream activity, and I think there is something great about doing it.
Firstly, no matter how much we thank Hashem, we will never achieve a tip of the tip of what we owe him. And second, and the impetus for me starting this thread, is that thanking Hashem for the (seemingly) small things we are blessed with gives us a perspective on how good life is, and it can make us into happier people.
Feel free to use this thread to post small things ("Thank you Hashem for diet coke"), for big things (Thank you Hashem for giving me a healthy baby girl"), or more humorous, though true, quips ("Thank you Hashem for DDF").