Have the two of you always been a conventional couple where he picks you up for a date and pays the bill? How about you reverse the roles for one night and take him out instead?
He will not only be surprised and caught off guard, but it’s also a good chance for you two to do something a little different. Take the time to get ready for your man the day you mean to surprise him and then just ask him to go on a date with you.
On the other hand, if both you and your partner have some time and air miles, why not plan a trip over the weekend? It will be the perfect opportunity for both you and him to break free of the routine.