This is what the Holy Spirit taught me today during prayer after Mass.
Never look back. Never let the past snare you, hang on to you, or slow you down. Never ever start thinking "I should have..." The past is gone, so move on. Start every moment with a clean slate. Know that the Lord God is ever with you and around you. In fact, he dwells within you (the Holy Trinity all present). And God is our Bright Hope, shining and leading us on, so focus upon him alone and follow.
Do not follow your own whims or desires, even though it may appear harmless. Seek God's approval first always. Also, God does not send gloom into our hearts, only peace and joy; so, open your heart to only what comes from the Lord.
Note: The above was not made up to make you feel good; it was heartfelt and truthful sharing.