immature

I get by in life, but I think I'm pretty immature. Most of it stems from a lack of self-discipline, I think. You see, usually I just do what I feel like doing, which doesn't usually include what I should be doing. Grown-up things like taking out the trash and paying bills. Getting work done on the car or going to work at all. I'm best at going to work, but that's because it has immediate repercussions, I think. I usually get them done, but it's last minute or late, and that's not good at all. I'm slowly improving over time, but it's only slooowly. It makes me wonder about people like my dad, and others from his generation, who just seem to get what needs to get done first, on time or ahead of it, and then go around to what they want to do. Getting ready for the future is something I only dream about, not actually do, but, again, people from my parents' generation seem to do it well. How do I change?