One of the things I do every morning to try to ensure that I have a good day is to affirm that I am going to have one.
On waking each morning, while I am waiting for the kettle to boil for my coffee, I say aloud ten times: "Something wonderful will happen for me today." Now that doesn't mean that bad things don't happen to me but it does mean that I am approaching each day in the right frame of mind so that I am more likely to attract good luck. Even when things go wrong, I am more able to put a positive spin on the event because I have programmed myself with this expectation.
It also means that I notice more that is already right with my life, things that I might otherwise take for granted. It does make you more likely to count your blessings.
Each evening, I review my day and there is invariably something wonderful to be acknowledged, no matter how "ordinary". Sometimes it is simply the gift of still being alive. Something that can be taken away in an instant. A few years back, a colleague of mine died while working at her PC at home. She was found sitting in her chair, a cup of coffee at her side. Death is not always something you can prepare for.
Perhaps we should all live every day as if it were going to be our last, providing that doesn't lead to our being selfish or inconsiderate.