Do you worry about the future? If so, how much do you worry? What is an unhealthy amount to be focused on the trials which will inevitably come?
It is certainly not a bad thing to consider the future. After all, you must plan ahead to be an effective leader and contributor to your family and community of believers. You can't help but consider the future when you think about dealing with your own death, avoiding unnecessary conflict, or learning what triggers your sinful habits.
There is a sense in which we need to consider the future every day. If we sin every day, or at least face temptation every day, or need anything at all everyday, then we must pray for God's help every day. This is looking to the future wisely.
The wrong way to look at the future is when you lose heart at the things that you will battle. When you look ahead and see the sin to come (and it is likely you will regularly sin until the day you die - not habitually though), and if this looking ahead produces despair or robs you of your trust in Christ, then there is something wrong.
We serve a great God who is sovereign over all things, including the future. He has the power to get you through and to ensure that you do not face anything stronger than you are able to bear. Your visions of the future should be tempered with this knowledge, allowing you to walk in the joy of faith in Christ your deliverer.