Have an Answer?
First, if you are attending college, see what resources they have. They may have connections to help you.
Second, begin searching yourself for current listings. This can be Internships.com or Craigslist.com. There are many other sites as well -- Google them!
Third, start to find companies you would be interested in. See if they are hiring interns. If not, try reaching Human Resources by email or phone to ask if they are looking for interns, even if they aren't advertising such.