You may want to practice your drinking ahead of time so you can take advantage of the free alcohol without acting drunk.
(kidding of course)
In all seriousness, don't expect too much. I was so excited the first time I flew first and was sorely disappointed. It seems to me like first isn't amazing, but it's the way airline travel should be.
However, if you ever get the chance to fly international first/business first, on most flights over 6 hours, it's pretty amazing compared to US travel. Lay-flat beds, menus for meal selection, care kits and depending on the airline, you may even get pajamas.
Good Luck!!