6 Easy Steps
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1. Find some interesting forum posts and talk about it with the community
2. Make a skin and upload it
3. Create a server with some decent plugins and the newest version of Minecraft
4. Create a texture pack that is unique
5. Watch some tutorials and make a mod (Ex: Yourname's More Ores Mod)
6. Make a useful blog post like this and get diamonds.

Happy leveling! Diamond if this helped!