Specifically, the Salesforce Partner Premier Training gives you access to the videos associated in the Advanced Developer study guide:
Section 4. Recommended Training and References
As preparation for this exam, Salesforce.com Training and Certification recommends a combination of: hands-on experience building custom applications on the Force.com platform using the declarative and programmatic capabilities of Force.com code and Force.com pages; training course completion; and self- study in the areas listed in the Exam Outline section of this study guide. Salesforce.com Training and Certification recommends the following to guide your study:
- Instructor-led course: Force.com Code (Apex) and Force.com Page Controllers (DEV 501)
- Online resource: Force.com Cookbook
- Online course: Apex
- Online course: Managing Development with Force.com
- Online course: Visualforce Controllers Book: Force Platform Developer Guide
- Documentation: Apex Language Reference, Visualforce Developer’s Guide, Force.com Metadata API Developer’s Guide, and Force.com Migration Tool Guide—available on developer.force.com
- Become a member of developer.force.com
- Create a Developer Edition account
Enroll in instructor-led courses and launch online training from your Salesforce CRM application by clicking the Help & Training link in the upper right corner of the screen (requires login). Click Take Training and search for the desired courses, listed above. Non-Salesforce customers can register for instructor-led courses here: http://www.salesforce.com/training.
In addition, Salesforce.com Training and Certification recommends reviewing online Documentation, Tip Sheets and User Guides by searching for the topics listed in the Exam Outline section of the study guide and studying the information related to those topics. Documentation, Tip Sheets and User Guides can also be accessed through Help & Training. Documentation is also available in PDF format here: https://na1.salesforce.com/help/doc/en/sf.pdf.
Specifically, the online courses are available by searching their training.
Outside of that, you can focus your studies on:
- Force.com Apex Code Developer's Guide
- Visualforce Developer's Guide
- Development Lifecycle Guide
- Force.com SOQL and SOSL Reference
Outside of their specific guides, I would look through the rest of their technical documentation:
The biggest thing you can do is just work in Apex and Visualforce. I recently passed the Advanced Developer multiple choice exam and I have to say it was my easiest exam so far. Coming from a Java background, I can relate to the code much better than the Point-and-Click development. With a year of experience, I don't think you will have much of a problem.
EDIT: I have expanded upon this answer in much greater detail in an article for my blog, Salesforce Certification Series: Advanced Developer.