I use a lot of spare time to extend and upgrade my knowledge. IT is moving fast so it is key to stay up to date.
A very good place to do this is Pluralsight. Not already on Pluralsight? you should! You can try it for free. Get a subscription fast!
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It has a ton of good sessions about various topics. You can even test your knowledge and now where how far your IT knowledge reaches.
Good luck in studying!!