I am a huge advocate of praying the Rosary.
Praying the Rosary on a regular basis has an interesting effect on the soul. The more you pray it, the more sin begins to repulse you. Especially your own sins. Can a person pray the Rosary daily (with sincerity) and not be changed? I don't think so. Mother Mary must have obtained some great graces for those who pray it because ... it is life changing.
One of the first thing I started doing after my conversion was to pick up my beads daily and meditate on the mysteries of the Rosary. I had led a sinful life for years and was not really aware at the time just how deeply sin wounds us. I was susceptible to certain weaknesses and sins, especially in my thought life, and the Rosary became the weapon of choice for me. Actually, sin had dulled my soul to such a degree that the Lord had to "cheat" and poured extraordinary graces into it. He was "waking up" my soul and our Lady was helping. It was necessary because one doesn't come back from sin on their own. It's pure grace. And sometimes this grace comes in ordinary ways, other times extraordinary. I am guessing that the Lord allowed me many glimpses into the work He was doing so that I wouldn't lose heart or despair over my sinfulness. God never stops knocking though we may stop answering the door at times. A long time in my case. Thankfully, God is persistent.
I use the Rosary for intercessory prayer, to obtain virtues and special graces, as reparation for my sins and to meditate on Scripture. While meditating on certain Bible passages other verses often come to mind and I am often amazed by the connection between the verses. I don't always stick to the mysteries during the Rosary. Often I just try to follow the leading of the Holy Spirit and see where this takes me.
When I pray the Rosary I'll notice thoughts that try to sneak into my meditations. Distractions. These are my "attachments and concerns" usually. If I can't ignore them, I sometimes pray about them because I know they are popping up for a reason. They tend to be the same distractions with slight variations over and over so this is a good hint from the Lord about things I need to work on.
Another way that the Rosary has benefited me is that over the years I have become aware of its purging effect. Slowly but surely Our Lady cleans house. When I go through these purging stages I often feel like Pigpen from Peanuts with a cloud of dirt and dust surrounding me and clouding my vision. I feel filthy but the truth is that I am actually just more aware of my faults at these times than during times of consolation. I had a humorous dream years ago about Mother Mary with a broom and have no doubt that she's working hard still.
The Rosary has become my "signal" to the Lord that I'm ready for more cleansing and that I am opening myself up to whatever work He desires to do in me. My tacit permission to go on. God doesn't force himself on us and respects our free will. Some people use a holy word to show their acquiescence to the work of the Spirit, I often use the Rosary. It seems to work better for me, plus I am also fulfilling my promise as one who is consecrated to Our Lady to pray the Rosary.
If I could give 2 pieces of advice to those who have recently returned to the Church it would be this:
Receive the Eucharist as often as possible and pray the Rosary. Oh, and one more - go before the Blessed Sacrament. These three things will change your heart no matter where you are on your journey.