-seek to be with my loved ones. Beg for mercy for both myself and the world as a whole, (as well as for those I love and am concerned about). Try to save those I am around that don't believe in God (or don't know the end is at midnight). Probably a few other things will be a priority, but in the moments of hoping for the new kingdom to come, and the fear of people I care about (or myself) not being part of it. In those moments there will likely be tears. Joy, sadness, fear.
That all said this is if word got out the the end is at midnight and I believed it. I doubt I'd believe it unless I got this news from Jesus returning on heavenly clouds and telling the world you have till midnight.
That would trump my doubt based on the verse that no one knows the day or the hour it will occur. I doubt anything else would convince me.