Given you are there for quite some time, I'd suggest doing the hop on - hop off bus tour early on to orient and take you to the main sites (Sagrada Familia, the famous soccer club, whatever it's called, the crumbling and decaying Olympics stadia up on the hill - but the view is good.
Ten days seems like a long time there to me, so my other suggestion would be to get out into the surrounding countryside.
There are some good tapas restaurants just OFF La Rambla .
Thanks and that was quick. The time includes arrival/departure and, yes, we are taking a few day trips out to the country side. Rick Stein is doing a food series on Spain and has inspired us to learn more about Spanish cooking.
At the beginning of December we will spend 10 days in Barcelona. Normally a Summer destination, we are tacking it onto a Christmas trip to Munich. Any tips for Barcelona at that time of year?
Make sure you try the Pinxos Bars. The food is great. Try and buy tickets ahead of time for Sagrada Familia. I lined up for over an hour and had my phone pinched by a 'tourist'. Barcelona is a vibrant and exciting city. Enjoy it.
Barcelona is a great city and I'm sure you will enjoy the food and architecture. My only advice is to never carry more than 1 or 2 credit/debit cards and some cash on you. They have the best pickpockets in the world and locals are targeted too (no discrimination here).
Why? Isn't it better to lose the banks money than your own! Just get and use a low limit credit card for suspicious looking situations to minimize exposure.