Divorce is hard. It is not only hard on you but it is going to be equally stressful on the children. Just as you will go through. Just as you will go through a period of sadness and anger as well as worry and frustration so will your children. But just as you will get through this so will your children. In many ways they are likely to come out of it more capable and able to deal with stress the result.
The first and most difficult part will be sharing the news with children. It is important that you talk with your kids about your decision to divorce and what that means. Assure them that what is happening is not their fault and is in no way a reflection of your love for them.
It is important that both parents be there for this conversation and that there is no negativity, conflict or blame. This is the time to show the children that when it comes to them you are unified in a desire that they feel love and wanted and that you will both be there for them.
This conversation can go a long way to alleviating their biggest fears. Throughout the process both parents need to keep providing assurance that this is not the fault of the children and that nothing will ever change about how they feel about them even though they may live apart.