Subject: Eating cheaply in Europe
I would often go into the local deli/supermarket and get some cold cuts, bread rolls, fruit, etc. Then you can have a picnic lunch in the park or back in your hotel room. It's cheap, yes, but then on the other hand, with what you have saved, you can occasionally dine in a really nice restaurant (have the wine, dessert) without breaking the budget.

Also, some of the restaurants have a set lunch menu (with soup, main course, dessert) which is reasonally priced.