ballot box - vote
Since September 11th, 2009, a series of popular votes has been taking place across towns and cities in Catalunya over whether the community should become independent, and on April 10th this year, it's Barcelona's turn. While turnout so far has been notably low for these non-binding referendums - the latest one held in Terrassa on January 23rd saw only 11 percent of eligible voters take part - those who do overwhelmingly vote in favour of independence (in Terrassa, it was 90 percent).
If you want to have your say on this issue, whether you're for or against the motion, there is already the possibility of voting at one of the 'pop-up' ballot stations that appear around the city at different places and times. Keep your eyes peeled for a stall with a '10-A' sign above it; otherwise wait until Sunday April 10th when there will doubtless be many voting stations set up around Barcelona (the whole enterprise is run by volunteers and they are not being provided with 'official' polling stations).
To vote, you need to give your DNI or NIE, to prove that you are registered in Barcelona, then select your Yes or No slip of paper and put it in the envelope provided. You'll be asked to sign the back of the envelope (one of the organisers of the initiative is a notary, so they take these kind of things very seriously) and also a form where your name and ID number appears.