TUTORIALS I WROTE FOR THE PALO ALTO NETWORKS BLOG
- Customizing Wireshark - Changing Your Column Display
- Using Wireshark - Display Filter Expressions
- Using Wireshark: Identifying Hosts and Users
- Using Wireshark: Exporting Objects from a Pcap
- Changing the column display in Wireshark
- Adding HTTPS server names to the column display in Wireshark
NOTE: The two articles below were posted in 2013, so they're somewhat dated, but they contain some good information for people starting out.