I have to admit that this is one of my secret weapons on LinkedIn.

My Dad said to me when I was eighteen, that the network of friends that I create at school or university will one day become my most valuable business asset.  And it's true.

Take some time to look around LinkedIn's alumni feature, because what it reveals is quite often amazing.  There are many ways that you could potentially use it, but the ability to find introductions to companies or organisations that you want to work with or get close to is worth its weight in gold.