Im only going into my senior year but in the yearbook they do quotes like your favorite quote and I'm already looking for mine. I want something different but strong and meaningful.
Something like::::
"when the power of love overcomes the love of power the world will know peace."-Jimi Hendrix
'The will of God will never take you where the Grace of God will not protect you.'
"Dreams Are Illustrations From The Book Your Soul Is Writting About You!"
"What you do in this life Echoes for eternity"
This is one of my favs:
"There comes a point in your life when you realize who matters,who never did,who won't anymore...and who ALWAYS will. So, don't worry about people from your past, there's a
reason why they didn't make it to your FUTURE."

Those are just examples of quotes I like so you can get a better idea of what to suggest... uhmm anything is a good choice as long as its appropriate for a hs.. uhmm it can be a movie line, a quote, a lyric. Anything.
Oh and I go to a catholic high school so it can be about god as above...
I want it to be different and strong and meaningful so member that! :)

Oh and I have been thinking about this one to but they used it last year on the last page of the year book:: "dont cry because its over- smile because it happend"-Dr.Suess.
I love that quote lol... and I love his "ppl who dont mind matter and the ones who mind dont matter" smart man he was.
OK stopping rambleinggg now :)

Thankss for all suggestionss