Time or Project Management - how to successfully multitask
Methods to organize your boss's office - we all keep ourselves organized
Conflict Management - work with divas anyone?
Stress Management - count to ten much?
Work Life Balance - sounds fluffy but how many of us really leave the job at 5
Keeping up with technology - overview of upcoming IT capabilities
I would have to say I have never learnt how to do any of the above by attending a seminar. For me these aspects of being a PA/Admin Professional is common sense, stuff you can only learn on the job and through experience.
Keeping up with technology is a given if you want to progress in any job. I was amazed when I started my company 3 years ago how many of the admin staff have very basic skills in using MS Office and other software applications. Not only did I notice it, but it was mentioned to me personally.
IT is the main aspect I think I would focus on. The rest comes with experience.