How to Troubleshoot Networks

Hi Rene/Laz,

I am new to CCNP course, and I must say that the way you explain concepts is just commendable.

Though i have been following the course and practicing but I need some suggestions/advice in troubleshooting. I want to learn how to actually read a network. I want to get familiar with my work environment and I need help how to start with that.
What are the things we should do first when starting troubleshooting a DC/network.

I hope this makes sense.

Thanks
Tanya