Actions speak louder than words...but what if they didn't speak at all?

Hmm.
I am very intrigued at the moment. Is it because there is something in front of me? Not physically...but emotionally, yes.
I want to know something right now. This might not be stemming from anything in particular, but I think this may have to be put out there. 
Why are people lazy?
No, that is not a good question to ask. I'll rephrase it: how are people not motivated to follow through on their words? On their dreams, their tasks, their promises? This has been starting to bug me since the summer, since I jumped into many commitments involving work and leisure. 
What I want to know, is when people say they will do something, why don't they actually do it? It drives me crazy to know that people will say they will go attend a friend's soccer game or mail out a postcard or make plans to go out, and it never actually happens.
Granted, I know things come up and situations arise, but it the responsibility of the person to at least either make it up or let them know what is going on. It is truly pathetic if one's actions don't mimic their words.
Why am I even talking about this? I'll tell you why. This year alone proved to me that some people don't follow through with what they say. At the start of the year, I decided I like to bite off more than I can chew. I love being busy, and it has become a lifestyle choice that I do not believe will ever change. I have been involved with Greek life, three executive boards, and worked five jobs all at the same time. Despite these commitments, I still make time for my friends, my relationship and most importantly, myself. I make certain that any plans I make follow through and if they don't, I would try my best to make it up to the person(or people). Even if I am busy as hell, I still own up to what I am able to do. My commitments are not random or sprung onto me because I want to see how much I can suffer, but I know I can follow what is expected of me and perform at my very best.
I know plenty of people with many commitments as well: school, clubs, sports, you name it. But you cannot be involved if you are not going to apply yourself. Some people I know are paying for school ENTIRELY on their own and making the most of their college experience, and some people are getting a free ride and not making anything of themselves. Yes, I know it is their choice, but it is still a shame to see someone work so hard and barely getting by when others just lounge around all the time. 
My main point is that if you are one of those hard workers who came to college for more than just an education, I tip my hat off to you. But before I even do that, I want to know and trust that you have been following through with your responsibilities. If you hold a position in your club, team or organization, do what you're supposed to do. Follow the guidelines of your position and do what you say you are going to do. I am so tired of seeing all the work get put onto one person, and lately, I feel as if that person was me. School and work aside, this also goes for relationships. If someone asks you to do something, do it. If a friend needs help, help them. If your partner needs some more love, give them that reassurance. If you make a promise, please keep it. I've lost so many friends because I could not count on them, and broken promises are hard to overcome. 
Please just hear me out: I am not blaming anybody for their actions. Whatever you may be dealing with, put more effort into it. I swear you will achieve more success if you just care a little bit extra. Be more motivated to fulfill your duties with style. Put more time and energy into everything you do. Your friendships will last, your jobs will reward you, your organizations will thrive and you will feel more at peace with yourself. 
On a last note, I will tell you a brief memory. When I was growing up, I was always told that I was going to be taken to DisneyWorld for a vacation. I am twenty-one years old and still have not had that experience. Please, for the sake of those who care about you, don't let forgetting, excuses and being "tired" be the reason why people can't count on you. 
Wake up and give a damn.