A good training tool that I like to use, which is available on any version of melee, is to practice on the "heavy bowser" or "heavy ganon" CPUs. Just turn the handicap on, and adjust the ratio for damage to .5, then make sure your handicap is set to 1. Practice consistent drill shines first, then drill into wave shine, then when you're comfortable with your execution, try to implement more aerial attacks in and out of shine. Practice shine grabbing, and then just mix it all into a variable routine that works best for you. I typically just do it until I ensure I kill the dummy starting from zero. For general training, just try to do it for consistency. When you get farther along, go for making sure you are constantly striking the CPU, then finally, go for killing it, on any stage you are practicing on from zero. This is a simple plan, but is more tailored to getting you familiar with when to L-cancel, and what you can do out of shine on low percent characters. Its literally like weight training. once you start hitting normal weighted characters again, youll immediately see your improvements if you stick with it. A normal fox compared to a "heavy" CPU makes it feel like you're beating up a pillow in comparison. you can move faster, and make better choices in follow ups, because you'll be so used to the stricter timing of beating up the bowser or ganon. But, this is just a personal recommendation. Take it at your discretion.