LinkedIn is the best networking tool I have ever used and I would highly recommend it. I have created over £1 million in sales using LinkedIn - how brilliant is that !
LinkedIn works on search words. Every word in your profile can be searched - so think carefully of what you put on it.
Some tips :
a) Make sure your job title says not just what you do but what your company does - these are search words and google uses them as does linked in.
b) Subscribe - you get much better benefits as a member. Its worth it. Sending Inmail is very useful plus you get many more search results with a paid membership.
c) Search for "Director" or "xxx company" - you will find who you are looking for ! Simple.....
d) Get yourself recommended by others - it improves your profile.
e) look on a google search for "Better search results on LinkedIn" - there are loads of articles showing how you can improve your profile.