The most convenient way to bring your money is in the form of a debit or credit card, with some extra cash for use in case of an emergency.
When to Tip Tipping is almost always optional.
Restaurants Many Spaniards leave small change, others up to 5%, which is considered generous.
Taxis Optional, but most locals round up to the nearest euro.
Bars It's rare to leave a tip in bars (even if they give you your change on a small dish).