Hi Isobel:

To pray, you can think of calling Buddha and pray for your wish to come true.  Whatever luck you need, visualize that Buddha appear in front of you in the air,  blessing you with very brilliant white light toward you and your wish (whoever concerning your wish, people and places), visualize that Buddha bless on your wish to come true, visualize that white light enter your body, turn all the bad luck into dark vapor, leave your body throught the skin poles.  White light keep coming in, and dark negative energy leave your body, your whole body rediate great white light, full of possitive energy.  Frequently do this visualization, will help you with a lot of osticle and prayer in your life.  I hope this help.  :)