Test Resources and Links

I'm not going to pretend this is any way exhaustive. This isn't even scratching the surface of available testing resources however hopefully these will give you the direction to explore.

Testing Heuristics:

http://www.satisfice.com/tools/htsm.pdf - James Bach
http://testobsessed.com/wp-content/uploads/2011/04/testheuristicscheatsheetv1.pdf
http://katrinatester.blogspot.co.uk/2014/09/heuristics-and-oracles.html

Tester Development and Training:

https://dojo.ministryoftesting.com
https://lisacrispin.com
http://www.developsense.com/
http://angiejones.tech/
https://www.testagility.com/

Recommended Blogs

https://thefriendlytester.co.uk/
http://www.duncannisbet.co.uk/blog
http://qualityminds.de/en/blog
https://dannydainton.com/
https://villabonebeer.wordpress.com/villabone-testing-adventure/
http://www.testersfindaway.com/
https://rightsaidjames.com/
http://theartfultester.com/
http://www.rosiesherry.com/
https://thegrowingtester.wordpress.com/
https://thisgirltests.com
http://www.cassandrahl.com/
https://mysoftwarequality.wordpress.com/
https://testpappy.wordpress.com/
https://exit-23.co.uk/
http://katrinatester.blogspot.co.uk