How should i better manage my time throughout the day?

I'm a teenager and manage my time well throughout the school week because it eats up all of my time. However on weekends i find that i can't manage my time to get simple and quick tasks done. Like for example, i thought to ask this question last weekend but am only now getting to it. I have a list of reminders on my iPhone of everything i need to do but can never manage to get it done. Whether its because I'm lazy or sleep in too late i just can't. By the time 6:00 rolls around I have a ton of free time but I'm too lazy to do anything that i need to or WANT to.

so i guess my question is how do i stop being lazy and do things throughout the day.

Easy answer, hard to make yourself do. Write a list of what you need to get done that day and set an alarm to get up at a reasonable time. Start doing something on your plans within an hour of getting up so you don't feel lazy. There are books on time management, but that would take even more time.