Another take: have the guests (or the bride) guess what the gift is before the bride opens it. Sometimes the advice given (say "never go to bed angry") can make for interesting gifts.
Giving the bride the practical gift paired with the sentimental advice can be tricky. Here a few creative ideas BH&G gives us to get you started:
Advice: Celebrate every day.
Gift: Champagne flutes or a beautiful cake plate.
Advice: Take turns cooking for each other.
Gift: Favorite cookbook and kitchen tools.
Advice: Experience new things.
Gift: Travel accessories.
Some others:
Advice: A happy wife equals a happy life.
Gift: Spa gift certificate, bath & body products
Advice: "Love is when mommy gives daddy the best piece of chicken." Elaine - age 5
Gift: Cooking and baking pans
Advice: Laughter is the shortest distance between two people.
Gift: Comedy DVD
Of course BH&G takes the theme to an extreme. Besides the gifts, they suggest naming and serving food with the same theme. Think a clever quote to a toothpick topper on the cupcakes, Sage (Advice) Biscuits,and "Confucius Says" Noodle Salad recipe. And for favors: fortune cookies of course!