What is the tipping procedure in Lisbon ... hotels, cabs, restaurants, etc.?

It's very different from America here. We don't leave 10% of the check like you do. We usually leave about 1€ on average. In restaurants about 2€ is very generous and in cabs 50 cents should do it - the fares are high enough as it is. You will probably overtip in the beginning because you want to do the right thing, but trust me don't leave like 5€ in a restaurant - it'll be kind of ridiculous - unless it's a super mega luxurious restaurant.

Lisbon is Europe's second-oldest capital and once house to the world's greatest explorers like Vasco da Gama, Magellan and Prince Henry the Navigator, getting the initial correct world city, the capital of an empire scattering over all continents, from South America (Brazil) to Asia (Macao, China; Goa, India) and know you can invest several day to learn this historical town, with hotelbye is where you must start. The absolute most acknowledged of Lisbon's major attractions could be the St. George's Castle. This fort instructions a glorious position near Alfama on the top of a mountain overlooking the Portuguese capital. That is certainly one of Lisbon's most widely used tourist destinations. Their outstanding battlements, interesting memorial, and exciting archaeological website combine to really make the castle a gratifying experience for everyone, and kids particularly will like clambering within the durable surfaces and towers that encircle the grounds.

In Europe, waiting staff in restaurants and cafes are paid a proper wage, so service charge is usually included in the price, if not they will let you know somehow. A couple of Euros for good service is generally acceptable.

I don't know about taxis, I never take them, I just rely on the trams or buses.

in hotels, about $10 is a lot, for cabs, even $1 is appreciated, restaurants, about $5 is very appreciated