First - you can never predict these blow-off events. Truly - Google's trading day on Friday was the biggest one day market cap gain for a stock in history - a one off for sure. Yes, the second biggest market cap move in history belongs to Apple. However, Google has been in a trading rut for a long time and was due for a huge snap-back move to the upside. Apple has already had it's repricing moment and seems far less likely to see such a spike.
That said - if you own Apple - just hold your position. No need to do anything tomorrow. If you don't own shares, I say - don't chase. The stock is near all-time highs and I don't believe the risk reward ratio is in balance. There are rumors the watch will truly disappoint and be a drag on earnings. If that happens, you might get a re-test of recent lows and hence - a better price.
Short term rating = HOLD
Long term rating = BUY