I Am On A Quest For Self-improvement. How Can I Efficiently Become A Better Gamer?

I am currently on a campaign for self-improvement. A lot of aspects are involved. One thing I am upset about is that it seems that no matter how hard I try, I can never succeed at video gaming, despite the fact that I was awesome as a kid. It make me feel old. So what I am wanting to know to help is:
1.) How do I efficiently improve my skills in first person shooters, RPGs, action/adventure, sports, and strategy games (both real-time and turn-based)?
2.) I have heard that, in MMORPG’s especially, many people use macros to help them advance without investing so much time. In the past, this has frustrated me. Any insight into this?
3.) Can you use an external hard drive with Xbox 360 and Wii through the USB port? I’m finding that the new 120 GB hard drive for X360 is pricy, and I would appreciate if Wii had a hard drive.

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