Being a divorced, single father can be extremely difficult at times, especially if the mother of your child goes out of her way to make your life complicated and difficult. There are a number of negative things that can exist between you and your former mate, but you need to make sure that they do not drive a stake between you and your child.
You may find yourself in a situation where you want to lash out at your ex, or you may be tempted to start bad mouthing her in front of others, but you have to stop and ask yourself "Is this the message I want to send to my kid?" The answer is no. Your child needs to be first on your priority list and you need to ensure that you behave appropriately to make sure that doesn't change. Your child should look up to you, so make sure the role model they're seeing is one that they will be proud of.