Read the forums.

Read the wiki.

Start writing macros.

Look at the abilities of the classes you'll be playing and try and design complementary key mappings for them.

Set up your wow directories.

Decide on your addons and build your UIs.

Spend some time with your significant other (last chance you'll get).

Pick a flower.

Cradle a child.

Play with yourself...

Er... that's it.