dictionary.com states in part: blessed (adjective): blissfully happy or contented. bless (verb used with object): to bestow good of any kind upon: "a nation blessed with peace."
How do you know when you're blessed? By being aware of the blessings that are in your life. Notice them. And you will start noticing even more of them. Some of those blessings might be taken for granted. 1 in 10 people lack access to safe water. 1 in 3 people lack access to a toilet. 1 in 6 people lack access to electricity.
For today, I remember that I AM Blessed. I AM That.