I'm currently on a train to Rotterdam as I'm writing this. Why are the trains in other countries cleaner, timelier, and cheaper? America, I know there's probably not an easy answer but make it happen!
Listen to Fado Music - It's the Portuguese blues. I like to go to impromptu Fado venues where the audience can participate and freestyle with the musicians. The more authentic Fado is in the Alfama district. Go to A Baiuca. Other restaurants to find Fado are at Clube de Fado or the Fado & Food Group.
Time Out Market - Excellent food market with all types of food. Foodies and picky eaters alike will enjoy it here.
LX Factory - A Hipster area with restaurants, bars, and boutique shops. Visit to grab lunch, have a drink, and shop around.