Twitter Toolswill enable your site to automatically post new photos on Twitter once you publish a new photo on your site. Once the plug-in is installed and activated, navigate to the plug-ins settings page:
1. Enter your Twitter account credentials (the plug-in will be switching to OAuth very soon);
2. Select 'yes' for "Enable option to create a tweet when you post in your blog?";
3. Select 'yes' for "Set this on by default?";
4. Save the options at the bottom of the settings page.
Twitter Friendly Linksturns your site's ordinarily long URLs into much more manageable, aka more tweetable, links. This allows you to better customize your shortened links, rather than relying on other third party shorteners or resorting to other workarounds. You can choose whatever options you'd like, but be sure to enable the "fix" for Twitter Tools at the bottom of the Twitter Friendly Links' settings page.
*The information and/or opinions contained in this post are entirely my own and in no way reflect the views of Twitter, Inc.