Hi Abby, why not do a real big 180 regarding his birthday? What would be the opposite of what you have "always" done in the past? What could you do....or not do.....that would make him stop and think about it. What would make him think, "Wow, she has always given me parties and done all these nice things for my birthday!"
If you have a mischievous side to you, you could even pretend that you are not thinking one twit about his BD coming up b/c he has been a bad boy and does not deserve anything special. Kind of let your imagaination take over.
On a more realistic side of this, I would not "over-kill" by trying to impress him and go over-board in your efforts. Remember, you are worth a trillion bucks and he needs to be working to keep you! He is a lucky so & so to have you for his wife and he needs to remember that! You just keep holding your head up high, shoulders back, smile on your face as if you've been up to something and are quite pleased with it (that will drive him crazy) and just go about life loving every minute of it, and knock him over with your flirtiness and sensual behavior toward him in private. Always have a hint of mystery about you. Never tell every single detail......it ruins it for the man...
Take care, Sandi
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!