Flo-joe

The place on the web for Cambridge exam preparation.

http://www.flo-joe.co.uk/

Here you can find a lot of resources. For example, collocations exercises like:

Verb/Noun Collocations

Collocations

Here you can find information about collocations:

http://menuaingles.blogspot.com/2009/05/collocations.html

list, exercises, examples.

idioms-collocations

Enjoy