AAPL has been very good to me as well, I bought in at $73.25 in 2006. I bought more in 2009 right around the 3gs announcement at $140.66. Then in 2010 when the iPad was announced I bought a couple of times (especially when it went below 200 at an average price of $201)

I have found it tends to dip right around or after announcements, there are usually good chances to buy especially if the announcement doesn't blow everyone out of the water.