I dont know how you feel about bible versus but there are several in the bible in magic article by christian wiccans. You may or may not want to incorporate them into your own spell with other correspondances such as planetary symbols, days of the week, moon phases, candles, herbs, stones, sigils and blood. ~blessings~
Here's a simple one. Use a yellow candle and inscribe what you want to happen onto it. Cast your circle and light the yellow candle when the moon is waxing or full. Let the candle burn through to the end.
Now also remember that spells ASSIST with what you want ok, so you still need to prepare for your meeting with your supervisor in the same way you would without having done the spell. :)