1. Stop worrying about what you feel during contemplative prayer. You won't always feel like you have been lifted to higher realms. The real test of how contemplative prayer is going has far more to do with the changes you see when you aren't praying. Are you becoming more holy? Are you at least wanting to become more holy?
2. If you don't already do it, have a word of welcome . . . a way to say, Lord, you are welcome in this place (that is, your soul). Find a place that's quiet, get comfortable, and invite God to come to you. I say Come, Holy Spirit.
3. When the busy thoughts of life start bothering you, simply set them aside one-by-one. If it helps, imagine that you are putting them in a box and as you close the lid, the volume goes down until you don't hear anything.
Remember, silence is God's first language . . . so go and speak His language.