1.Make sure the company you work for does not prohibit the husband and wife working in the same company. Some companies (MNC's) too have such a rule and so one of them might need to find a new job just before marriage or soon after it. 2.If you plan to work out a office relationship,have a clear understanding of what is official and what is personal. Personal things if it gets into office or work can break your career. 3.Have a liberal heart to let your partner to be his/her own self when in office. You cannot expect a favour from him/her just because he/she is your man/woman.
Just before I end, one piece of advice, just don't run behind all this, if it happens by itself well and good, if it doesn't it is not the end of the world. Live life as it comes, have lots and lots of fun.