I see you wrote a book about ASDM, how do I enable it in ASA 7.0?

Thanks for the question. To enable ASDM do the steps outlined below.

Step 1. Download the current ASDM image file from www.cisco.com. Check the readme to make sure it's compatible with your version of the ASA OS.
Step 2. tftp the ASDM image to your ASA device.
Step 3. On the ASA device enter the "dir" command to verify the ASDM file name.
Step 4. On the ASA device enter the command "asdm image flash:/asdm-521.bin" substitute my file name with yours from step 3.
Step 5. On the ASA device enter the command "http server enable"
Step 6. Ensure that the workstation you want to use to manage your ASA device has connectivity to your firewall. Use the ping command.
Step 7. On the ASA device enter the command "http 0.0.0.0 0.0.0.0 inside" to ensure that ASDM can only be launched from your computer. You must substitute your ip address instead of the zero's. For eaxmple if your address is 192.168.1.100, the resulting command would be "http 192.168.1.100 255.255.255.255 inside"

The resulting commands should look something like the following.

asdm image flash:/asdm-521.bin
http server enable
http 192.168.1.100 255.255.255.255 inside

After that you can access your firewall using ASDM by entering
https and the nside address of your ASA device.

Good luck. Let me know if I can help with any other questions.