How do you handle financial differences in a relationship?

Without going into too much detail…

I’m curious, if you’re in a close romantic relationship (living together, unmarried, in the case I’m thinking of) and there is very significant financial disparity, how do you handle it?
I’m thinking mainly about lifestyle choices, like vacations and where to live, etc, when one member of the relationship can’t afford the things the other can.
I think the situation in my mind is coming to a reasonable conclusion but there are still unresolved issues, so I’m just interested in other peoples’ experiences.