I love the Miraculous Medal and all that it stands for as a contribution and witness. I was given mine for my First Holy Communion and it is one of the most precious gifts anybody has given to me. You can read about my sadness at losing it earlier this year (The loss of a little witness) and the delight I felt when I found it(http://thedreamersday.blogspot.com/2009/02/rediscovery-of-little-witness.html)
I have included a beautiful prayer which you can use in meditation upon the medal which comes from the Malitia of the Immaculata
What I love about the medal is the inspiration it has provided others like Fr Kolbe who in 1917 founded the Malitia of the Immaculata - check out the website to find out more and even join! There is loads of great information about the medal, how to live its message and how Fr. Kolbe lived its message http://www.consecration.com/. Here is the prayerOh Mary, this medal is a sign and a guarentee of your presence.
You are present because your power is present, your voice is present and your love is present.
Therefore, O Immaculate Conception and mother of the Church, we call on you now to fulfil your guarantee. Rain down upon us the great graces you promised to those who carry this medal, especially to those who wear it around the neck. Make us perceive your presence now and always.
Make us consciously experience your power, love and guidance, that in your meditation we may begin to share your perfect respnse to God and to each of his creatures, and to join in your war against the ancient serpent.
Help us to abandon our self-centred feelings and preoccupations. Help us to accept our sufferings, offering them back to the father through you.
Teach us to listen and learn, that by becoming one with you in purpose, we might more fully respond to the Father, Son and Holy Spirit, participating in the life and unity of the Trinity through your intercession. Amen.