As previously stated, there is no way to make the wishes come true by magic alone. I encourage you, like with all magic, to petition for realistic things. It's a good maxim to keep.
Now, there are a couple different ways to send your desires out into the world. Petitioning an entity is one, as stated by a poster above, but I wouldn't recommend it without having first established a relationship with the deity or spirit.
There are other smaller methods to doing it without positioning a spirit. Depending on your wish, you may want to construct a spell around it. But for a general desire, you could make a petition paper or sigil and send it off some way (such as burning it). This could be on paper or a bay leaf. You could also make a small booklet for goals you want to achieve. Then, make an affirmation to repeat over and over as you strive for this goal.
Just some things off the top of my head, I'm sure there are more.