Hi juliec, and welcome to cruise-chat.
I agree with waterart, above. If there is an excursion that you are very interested in and would be upset about missing, then book it now. You can do this through the Princess Personalizer on the Princess Web site--you'll need your booking number to access it.
As your cruise is coming up shortly, be aware of any deadlines for booking online, as well as penalties for cancelling.
And, enjoy your short countdown!