I have recently been working my way through the Trainsignal troubleshooting training videos, as I have previously mentioned on this blog, the way Trainsignal does their training really suits the way I learn. If I am able to follow along with visual demonstrations I will pick something up much quicker than reading a book. In this latest training vExpert David Davis covers all the key areas to assist you with troubleshooting a vSphere environment, including storage, networking and VMware features such as HA and DRS. This training would be a great help if you are looking to take the VCAP-DCA exams.
As usual the training is available instantly online when purchased through the http://www.trainsignal.com site, the training also works directly from the site on your iPad for ease of access. I am finding the CLI sections of particular use as often if you are trying to troubleshoot a significant problem you find jumping to the CLI is the quickest way to get your answers.
Virtualised Reality 
Thank you for the review of my vSphere Troubleshooting course. I put 3 months of work into this to try to make it the best that I could. I am always glad to hear that it helped someone advance their vSphere skills and solve a real-world problem.
All the best,
David