Here's info from the DOA Facebook page on what to do before the site goes down so that you don't lose some potentially important stuff:
Before the Migration
Save your profile photos & member album images.
These will be replaced by different features on the new site and will not be imported. After the migration, these images will be permanently deleted. Please save your profile photo and any images in your member albums that you would like to keep.
Download your private messages and tidy up.
Your private messages will be imported to the new site, but the folders used to organize them will not be imported. All messages – including both sent and received messages – will go in your inbox.
We strongly recommend that everyone back up private messages. If you scroll down to the bottom of your inbox, there is a Selected Messages dropdown menu that gives the option to download your messages; the TEXT option works fine for most purposes.
Once you’ve downloaded your messages, please delete any old or irrelevant messages from DoA. Even if you do not feel comfortable deleting messages from your inbox, it will be a big help if you delete messages from your Sent Items folder.