If you decide to go on a mapping spree over the holidays.
http://countermap.counter-strike.net/Tutorials/ (http://countermap.counter-strike.net/Tutorials/)
Select Basic and Expert Tutorials
http://www.cs-maps.jolt.co.uk/ (http://www.cs-maps.jolt.co.uk/)
http://www.egir.dk/ (http://www.egir.dk/) has many interesting tutorials, more than just how to's