Accountability is an important aspect of growing in deeper union with Christ. From one perspective, frequent prayer gives you more awareness of your sins and a greater strength to face them. Taking a different point of view, making a psychological and/or intellectual decision to face your bad behaviors or the negative consequences of your attitude, makes prayer all that much more possible.
When we stop lying to ourselves and to God, we can actually hear more clearly what is that God needs from us; we are better able to walk down that path toward Him; and we are more prepared to help others grow as persons and servants of God.
St. Paul tells us this in Galatians 6:1-5
"My friends, if anyone is detected in a transgression, you who have received the Spirit should restore such a one in a spirit of gentleness. Take care that you yourselves are not tempted. Bear one another’s burdens, and in this way you will fulfil the law of Christ. For if those who are nothing think they are something, they deceive themselves. All must test their own work; then that work, rather than their neighbor’s work, will become a cause for pride. For all must carry their own loads."
To put it more simply: face your sins; repair your relationships; go before God in joyous supplication; hear His will and follow it.