GIFT CARDS FOR MANY STORES
Mamapedia is offering $10 gift certificates to any merchant on giftcertificate.com, for $5 through Thursday (though they may end the deal since it's a limited offer). This is good only for San Francisco area residents who are new customers of Mamapedia deals. The gift cards don't expire. You buy the voucher and then go on giftcertificate.com to choose what card you want. Choose from hundreds of stores, hotels, theaters, airlines and more. Stores include the Gap, Old Navy, Borders Books, Macys, SpaFinder, Lands End, Barnes & Noble, TJ Maxx, AMC Theaters, Bath & Body Works, Fandango and more. I've used giftcertificates.com before with no problem (my husband's company gave certificates out as a company gift).
BAY AREA DISCOVERY MUSEUM
The Bay Area Discovery Museum has a good deal right now on Groupon. Through today, you can buy two tickets for $8 (value: $20), that expire May 31, 2011. You can buy up to 5 sets.
If you're new to Groupon, get the deal here. It's on the San Francisco page, so if a different page comes up, click on the city at the top (under "featured deal for") and then find the city.
If you're already a Groupon user, get the deal here.