1. Blueprinting principle
The blueprinting in Tridion is a fantastic way to keep all building blocks of a website separate, yet together. The most obvious advantage is the ability to create a piece of content on a main content publication level and having it translated on local country publication levels.
But, using the blueprint structure is also ideal in separating structure from content and making the creation of other channels/sites (read: mobile sites, campaign/action sites, etc…) a breeze!
2. Outbound Email
The mass mailing tool formerly known as TMCS has drastically improved functionality. Now you can easy manage different address books of subscribers, which can (but does not necessarily) be related to a publication. Now it is even easier to create campaign mailings or and subscriptions, import external data. And most importantly, especially in the case of many different websites and administrators, the security to manage and create their own set of contacts.
3. TMS (Translation Management system)
Not necessarily new to Tridion 2009, but seeing this tool in action for large multilingual Tridion implementation makes the efficiency of the task of translating very clear. If you need a lot of translations done this is the tool to save money with.
4. Compound Templating (especially with XSLT support)
Compound Templating already was a great new way to do Tridion implementations, but with the new XSLT Mediator extension Templating has even become easier. That is if you prefer XSLT over Dreamweaver Templating. Personally I find XSLT templates much clearer.
5. Dynamic Publishing (or if you don’t want to make it static)
I love dynamic Tridion websites! How much better can you make it for customers to just have them create and publish one item, instead of having to create a page and to add the proper component presentations or metadata. Especially in combination with high level languages like JAVA or .NET dynamic websites can be extremely efficient and low maintenance. (But, if for whatever reason you want to create the leanest and fastest in pure html Tridion can do it as well… How much more flexibility do you need?)
You start with four sites, but you end up with 50 sites and 50 times as many visitors. No need to switch to a more high load CMS. Tridion can scale with your organization to virtually any size!
The keywords in Tridion were always begging to be used in a broader way. Taxonomy is a great new enhancement of the Tridion keywords. Creating relationships between different items, sections and in between keywords was never this easy. This will easily become the foundation of each new Tridion Implementation.
8. Event system
The event system can be used for the most basic tasks like automatically filling out fields, doing checks on field when saving, publishing or localizing, to triggering advanced processes. The event system is there to make life easier for the people who use Tridion.
Sometimes you need to be able to retrieve or add a lot of images, documents or other files inside Tridion. With Webdav this can be done like it is a just another folder on your local hard disk. (Combined with the event system, automatic image resizing can be achieved very easily)
10. Dynamic Linking
All links to your page or component are automatically (or removed) when you move it around on your site. No more dead links!
11. And more…
In a good Tridion implementation all these features are combined to create an easy manageable, flexible robust content management system with an equally well designed website. Many other features can be added, customized and built upon to create an implementation which can become the core of the online activities for any company.