search in Google effectively

There is nothing more unproductive and frustrating than being looking for information on Internet without finding exactly what you are looking for. One of the best managers I have had the opportunity to meet once told me that searching Internet it is like being thirsty and want to drink from the hose of a firefighter. I will always remember that simile. Well, here I present the 10 most useful tricks to search in Google effectively and quickly. Probably you already know many of them, but others may help you refine your skills.