If you know what you are doing you can make your own wish spell. You need a candle who's color is associated with your wish. Ex: pink=love, blue=psychic awareness, red=protection, etc. Then write down your wish on a sheet of paper. Say a chant associated with your wish. It can be something simple, just make sure you have a clear, strong intent. As you say the chant burn the paper with your wish written on it, as you do this visualize your words and the burning of the paper releasing the power of your spell and sending it out to take effect.
As with any spell a strong intent and belief that the spell will work is key.
It also helps to meditate on your desire or wish before you perform the spell.
Don't expect the spell to work instantly either. The spell will work in its own time. Just be patient.