The easist habit for me?
I'm tempted to say number 7 1/2 ("Play!") because I like to have fun at work but then I'd come across as a slacker, so my official answer will be number 3 ("View problems as challenges"). I'm good at tackling problems head-on with a spring in my step.
The hardest habit for me?
Embarrassing as it is to admit for a librarian in the 21st century, the truth would be number 6 ("Use technology to your advantage"). I've always been the last person in my circle to get onboard the latest technology fad, from microwaves to VCRs to cell phones. I still don't have an IPod.