Try to remember these general guidelines -
Be buying when others are selling and sell when others are buying. If you've been holding Apple - this is a great time to sell and take profits. If you've missed this run - wait for the inevitable pull-back. No stock goes straight to the sky as Apple appears to be doing at present. There *will* be a sell-off that will give you a chance to buy the stock. I'll use Google as an example -
I waited a long time to get a good price in Google - over 9 months. However - the stock finally sold off and I got a nice piece at a MUCH lower price.
Message of the day - set your list - wait for good pricing - and then attack - like a sale at a supermarket.