This is a subject of some debate in theological study. The idea of predestination, specifically that where people go after they die has already been decided by God is an idea they many believers don’t accept. Those who don’t agree with this way of thinking may prefer to give more credence to scripture, and the lessons that can be learned from it. As for the question of living in the event predestination were true, I would say everyone has priorities that more or less motivate their actions. While these priorities may not have much importance in regards to the afterlife, they may be important enough to dedicate time and energy towards while alive.