Getting a packet capture is great and all, however, its frustrating when the information you need is encrypted. To solve this you will need to grab the private key in pem format and load it into wireshark.
This is using wireshark 1.6.5
Open wirshark and go to edit -> preferences
In the preferences page on the left colum expand Protocols and select SSL
Click the Edit button in the top right for RSA keys list
Click on New to create a new SSL Decrypt Profile (You will need to create a profile for every unique IP address and port you would want to test)
Add the information
IP address: This is the IP of the device that uses the private key
Port: Add the port that you want to test (80,443,25,etc...)
Protocol: http, smtp, ldap, etc....
Key File: the private key in pem format
Password: Only if the key is password protected
Click OK twice and load the packet capture
in the display pane of the packet capture (where you can see all the packets) right click on a packet for the connection you want to view and select "Follow SSL Stream"