Look at a past project in your organization that experienced some problems. Try to find out if some of these problems related to the lack of collaboration and teamwork in the project. This will be useful as an example to employ later in projects. Do the same for projects that were successful.
Go to the Web and magazines and see if you can find examples of international projects that succeeded or failed. Gather lessons learned by trying to read between the lines as to what was successful in terms of joint work among firms.