Dear Aronaya,
I have tried a number of meditations myself, the most shocking of which were a combination of Reiki, Wicca Magick and Zik'r - the Muslim practice of using one of the names of God as a Mantra.
I have always believed that clearing the mind comes before opening it up to new experiences. Take simple candle meditation for example. A few seances with only a candle opens the gate to more focused concentration.
May I suggest you look at symbols through the ages and their historical and cultural meanings? You may find then, that the gateway into the collective unconscious (where Jung believed all alchemy took place) opens by itself.
Many have been through the same gateway before; you will find a familiar path that is paved with a secret promise of immortality.
Try the Tibetan Master symbol. I found it is more like a mandala than the traditional one.
Live long and prosper.
Esin