Vacations and honeymoons are a great time to sit back and relax, but that does not mean you have to let all your healthy efforts go to waste. If you and your new spouse are heading to London for your honeymoon then you'll definitely want to bring along TravelFit London ($15).

This handy, little travel guidebook gives you the ins and outs on how to keep off holiday weight gain in a city that treasures its fish 'n' chips. From finding bike tours to health clubs that offer day passes, to health-food stores, to walking tours, you'll be sure to keep up with your health while still be able to take in the sights. I love that it's small enough to fit in your purse so you can take it on all your outings. After all, Ben may be big, but you don't have to be.

If the City of Lights is your destination, be sure to check out TravelFit Paris.