Better Homes and Gardens has an article on their website about throwing a "Good Advice" shower. I really like this idea for a bridal or even a baby shower, because it is a great way to involve the guests. Plus, coming up with one line of advice, can't be too hard! Here are some suggestions on how to match the advice (from BHG) with the present:
Advice: Take turns cooking for each other.
Gift: Favorite cookbook and kitchen tools.
Advice: Experience new things.
Gift: Travel accessories.
Click here for the article - the main point is to include a cute card along with the invitation (maybe a pocket envelope invitation), provide some instructions on what to do with the card, and have the bride read each card aloud before she opens the present!
Another great suggestion, if you are doing your own food, buffet style, is to use square vases as containers. This makes for a nice uniform, modern look.
Go check out the article for some more great suggestions!