At the start of the summer holidays I took part in a MOOC (massive open online course) called 'Power Searching with Google' in which I learnt all sort of useful searching techniques. On the 24th September Google are running a second 'power searching' course.
The last course had 6 lessons spread over about 2 weeks, with 2 relatively easy assignments. When you complete the course you get a lovely certificate – not to mention your improved searching skills.
So if you use the Internet a lot I would highly recommend giving this course a go. Just go to the Power Searching site to register for the course, and you'll be emailed when it's about to start.