Get a statue of the goddess and make a little shrine -- this can be as simple as a nice cloth across the top of a small bookshelf or what have you, with the statue on top of it. Get an incense burner and some incense -- stick frankincense is good. When you want to pray to her, burn some incense, repeat the Orphic hymn to Athena, talk to her as you would to an older and wiser friend, and then clear your mind and listen for a while. It really is that simple.