Website - FollowUpThen. Sends you an email and can be time delayed so that it comes when you need it to remind you. Free version gives you up to 50 follow up reminders a month. Helps to keep you organized, especially while traveling.
App - Jott. It's a messaging app that works from Bluetooth. So you can chat with people within your 30 foot range.
A new case for your phone - The Life Proof Case by Otterbox. It's shock proof, water proof, and great for traveling.