Repentance
Paul is quite simple about repentance
"I preached that they should repent and turn to God and prove their repentance by their deeds." Act 26:20
For those who want to know what repent means look into the history of Israel, the old testament
and Hebrew
http://www.hebrew4christians.com/Holidays/Fall_Holidays/Elul/Teshuvah/teshuvah.html
Four Steps of Repentance Teshuvah:
1 Forsake the sin (Prov. 28:13). "Sincere repentance is demonstrated when the same temptation to sin, under the same conditions, is resolutely resisted" (Talmud Yoma 86b). Note that according to traditional Jewish views, the atonement is of no avail without repentance (Midrash Sifra). [shuv/strepho]
2 Regret the breach in your relationship with God and others (Psalm 51). [nacham/metanoia]
3 Confess the truth and make amends with those we have harmed (Prov. 28:13; 1 John 1:9; James 5:16, Matt. 5:23-4). Note that we must ask for mechilah (forgiveness from others) before receiving selichah (forgiveness from God). [shuv/strepho]
4 Accept your forgiveness and move forward with the LORD through faith (Phil. 3:13-14; 1 John 1:9). Be comforted by the Presence of the LORD in your life: Nachumu: "Comfort ye my people" (Isa. 40:1). [nacham/metanoia].
Finally, it needs to be said that authentic repentance is a lifestyle, not a "one time deal." We never get past it. Although there is certainly spiritual progress as we walk in grace, all genuine progress comes through ongoing teshuvah. We may repent from a certain action at a given point in time, but that does not mean that no longer need to do teshuvah. Teshuvah is perpetual and timeless, since it corresponds to our spiritual rather than our temporal lives (i.e., chayei olam rather than chayei sha'ah). Indeed, a true penitent is called baal teshuvah , a "master of returning," who is always turning away from self and toward God. We never get beyond the call to "repent and believe the gospel" (Mark 1:15). That is why the season of teshuvah is always timely. The message of Elul and the High Holidays is meant to be carried over throughout the rest of the year.
There is always a sense when we are always unworthy and humble.