Good idea, id never follow through with it though..while on a trip, send yourself a postcard every day from where ever you are and write what you did that day on it...then bind them when you return to have a journal of your trip -- complete with photos, stamps, and a run-down of each day's events!
Just go.when it comes to family vacation or just planning trips. this is my new saying, just go. Make the memories count in this life we live. Never know when it can all be taken away from you. Live life and explore.