1) Park Güell.
You cannot go to Barcelona without visiting one of the major works of art by Gaudi. The official website of the park advises you to book your ticket online to avoid the crowds. BUT if you get to the park before 8:30am or after 8:30pm you can save the 7 euros and explore the park for free at your own risk.
2) The metro is your friend.
3) The shopping.
4) Don't fall into the category of being a 'guiri'.
5) Misc.
2) The metro is your friend.
Unlike some european cities, Barcelona has a pretty good public transport system with most metros stopping off at all the major tourist destinations leaving you within a short walk of whatever you're trying to find. The only downside is that some parts/lines of the metro close at midnight and as the city has banned Uber, it can make it difficult to get home or just give you another excuse to have another jug of Sangria.
3) The shopping.
Of course you're going to head to Passeig de Gràcia, THE place to shop and with the country being the birthplace of Zara expect to spend a lot for less. Everyone knows the likes of Zara and Pull & Bear etc. are much cheaper in Spain than in England. The giant Spanish fashion brand sells clothes in its native country 39% cheaper than here, so wait until you get there if you’re planning on buying something.
4) Don't fall into the category of being a 'guiri'.
A.K.A tourists who spend their time walking up and down Las Ramblas drinking (overpriced) watered down sangria and eating dodgy paella. Las Ramblas is a great tourists spot but do not, I REPEAT do not spend any money on that street. Take it from someone who got ripped off, your best bets include the hidden corners of the Born and the Gothic Quarter.
5) Misc.
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