Most Job boards including ours now cover the European market. I would also advise doing a little research on agencies that recruit across Europe. Also If you have your CV on any searchable databases you will normally have a section for locations willing to work. Including Europe in this section will get you on relevant searches and you should start getting calls about European work. It may seems an obvious thing to do, but I know having worked in the past on CV databases many people miss out on plenty of opportunity because they limited the locations although they may well be willing to work in a different country.