Well, I'll start! 
I was looking back and it seems I became our "Laserfiche Guy" 8 years ago.
I've been to empower 3 times before - 2014, 2013, and 2007. Each year has been a wonder, enriching experience, and I can't wait till Empower 2015!
I am looking forward to learning more from the other user groups about what they are doing, etc. I'm signing up for advanced courses in administration, Workflow, and Forms, since we have lots of new opportunities in those areas.
All of the instructors are awesome!
Tip? Hmm... Take care when you schedule your classes. There are a LOT of sessions on a LOT of topics, so it can be a bit tricky scheduling everything you want. Many sessions are offered multiple times, too.
And... Network Network Network! Find people who do what you do in other places, and get their info. Go to the appropriate user group meeting, and meet people. Reach out - your co-users are a valuable asset!