Mavericks has a cool new feature. Every time you get a reminder within Notification Centre you have the option to close of snooze the reminder. By holding down the snooze button you are given a variety of different options to change the reminder time. For example you can change the length to 5, 10, 30 minutes, you can even snooze the reminder for a week.
This tip is very handy if you want to snooze a reminder and then get back to it within a bit. I find that if I hit the snooze button within the reminder I forget about it. Having a more specific option gives you the control to determine when you want to be reminded.