Ok first, NEVER under any circumstance talk about any spiritual experiences or meditation, or anything that has to do with what your doing spiritually. Doing that will cause anything you talked about to possibly be destroyed by ego. Not saying asking is bad, just for future reference.
Relaxation is a big part of meditation so try to become as relaxed as possible, would be the first step. Take very deep breaths for a couple minutes or however long you feel comfortable with doing it, Inhale through the nose and exhale through the mouth. Cut off all thoughts before they finish and try to do it until you just dont have any thoughts. Like "I need to get somthing from the grocery...." "I need to get .... " "I need.." I..." "...."
My biggest problem is getting tired while doing it then going to sleep, doing it in the morning helps with that. After you wake up is the best time to do it because your mind isnt as clouded by stuff that happend during the day. Don't get scared of anything you feel physically like chest pain and stuff, because thats just spiritual things you have never paid attencion to.