"Day Of" Planning?

Would anyone mind giving me info for my planning website about what "day
of" planning consists of? I keep hearing the term, but I'm not sure
what it is.

If you'd like, you can add it to my site directly at http://www.low-budget-fairy-tale-weddings.com/personal-wedding-plan...; and if you have a website and would like a link back to your site, please add it and I'll
make sure to credit you.

Thanks!