As a couple, you want to help each other out, support each other's vision of the future and give each other the best advice you can about reaching your goals. This is a great and lofty impulse for a romantic relationship, but don't expect the best results. In fact, you might want to just keep your good advice to yourself and concentrate on the more romantic side of your connection.
The problem is, you've each got your own ideas about where you're going and how you're going to get there, and the advice you give each other might actually conflict with their vision. You might go out of your way trying to encourage your lover to get more education, or to expand their circle of influence by introducing them to important networking contacts -- and then you stand by and watch them fail to take advantage of these opportunities. Instead of letting this damage your view of each other and the relationship, why not just back off? You each have to find your own path toward success anyway, and what works for one of you might not be the best thing for your partner. It might be best just to draw a distinct line between your intimate relationship and your careers.