I think in the astral plane..there is no such thing as a "spell" or a "ritual" I think its always diffirent..I think everybody has their personal way of doing things..while some might say an ancient tibetian scroll to enhance the power of their weapon, the other might say something completely diffirent(and mabey apearing ridiculous) , but it would work anyway.
And some might say nothing at all..

I think it all depends on your will power, self disipline and faith..and possibly the aid of outside forces but I wouldnt really recommend that one, never know who decides to show up.