There are a few tips I can offer you that I stole from videography:
1) Shoot a three shot sequence. A three shot sequence is usually a wide shot, a mid shot, and a close up. In video, you need to match the action, but not so much with still. If your subject is stationary, shoot your wide shot, move to a different location for the mid (like closer and a little more to the side), and get where you can for the close up.
2) Don't go out always with shots in mind. This is good sometimes, but in the effort in getting better, it's important to go out with the goal of shooting what you see. This helps a bunch. It's like the mantra with running. Run for time, not for distance. If you run for distance, you won't progress. If you run for time, you'll progress a lot further because you have no distance goal, and no finish line to call it quits. Do set yourself a cool little challenge though. Like go out and say "today, I'm only going to shoot close ups" so you start to look for things that can apply instead of letting the small things pass.
3) Zoom with your feet whenever possible.
4) People relate to faces. If you're at a car show, that's all well and good, but everyone is taking pictures of the car. Get the reactions of the people looking at the cars with maybe a little bit of the hood in it. It speaks leaps and bounds above everyone else's facebook car photos.
5) Choose a different perspective. Example, shooting a child or a pet? Get on it's level and shoot. Someone winning an award? Shoot from the bottom or from the top. The bottom gives the impression that the winner is a larger than life person. Above is just a different angle that can pay off. Like if they are raising their trophy over their head and you can see them looking up and shouting.
I didn't get a chance to see your pictures as they were blocked at work, but just go out and shoot. practice practice practice. New perspectives will always show improvement and don't forget to not let yourself get yourself down. What makes a good photographer is not the gear, it's the eye they see the world with.