If you like shopping, take time out to go to Point Shopping Mall when in Sliema. Hotels.com travelers also say the area is full of friendly people and has lots of nice beaches. It's also full of great shops and restaurants, so you can spend the afternoon having a wander. Splash some more cash at Strait Street, Merchant Street Market, and Bisazza Street.
You can learn about the history of Sliema when you stop by ll-Fortiżża. Wander the seaside and beautiful beaches in the area.