It is imperative to know the traditions and beleifs that are prevalent where your significant other originates from. The ability to either accept or not these beleifs will determine to a large extent if youy should go ahead with the marriage plans.
Knowing the strengths of your partner is important. You will have an idea of which one of you is fit for which task when you get married.
You should be honest with yourselves before getting married. Do not get into any relationship with the notion that you can change your partner's weakness. you must see willingness and visible signs for change from your significant other before making that decision. Change starts from within.
Knowing your fiance/fiancee's friends can help you decide if you still want to go ahead with the wedding plan
Knowing the family background and values of your intended Spouse can go a long way in teaching you how to relate with him/her when you get married.
Its important to discuss how you want your family to look like before getting married. Issues like place of residence, number of children can be discussed together as intending couples
It is important to know the medical history of your intending spouse. A good knowledge of this can forestall medical emergencies
There are details about your future spouse you need to know before waking down the aisle. These details will help you make a decision to accept that marriage proposal or not.