Collocations are an important aspect of vocabulary teaching. Simply, 2 or more words that often go together - phrases, expressions, binomials, idioms, formulaic speech. Lexical bundles or chunks. Here is a nice article highlighting their importance in a language.
Here are a whole pile of worksheets to use and get students focusing on collocations.
Read all the books related to main collocations on Gif Lingua - each with a flashcard set and video lessons (hit "Settings" then "Study" on the main page of any book).
Try this BBC quiz of 109 common collocations.
Words is probably the most popular lesson about collocations and its an amazing video! See the lesson materials and video HERE. A MUST resource. Also see the ppt there all about collocations.