Three plaques (13-23)

A wise person hung up three plaques in his office that he would read daily.
Written on the first was, “Your today, your today!” Meaning, live within the boundaries of today, working and striving.
The second said, “Reflect and be thankful.” Meaning, contemplate GOD’s blessings upon you and then be grateful.
And “Don’t be angry,” was written on the third.