I used to meditate much better at 18, could drop into it quickly and produce some amazing visualizations. A few times I could imagine seeing the room 360 degrees around me all at once and in great detail.
Now it takes longer, when I rarely do it, and even the onset of primitive hallucinations usually snap me out of it. I don’t have a clue how to get good at it again. There’s probably some guided meditation tapes out there.
I like to use a mind machine like this one http://www.3pounduniverse.com/shopping/shopexd.asp?id=4
or stuff I've downloaded onto my ipod. I have Mother Angelica says the rosary on my ipod too. I draw on many different types of meditation for my practice.
If you want to discuss further, feel free to freepmail me.