Focus on chess learning and improvement and your rating will eventually catch up to you. Going for "fast improvement" shouldn't be a goal because there's no shortcuts to chess. It's true that there are well-trodden paths such as theoretical endgames being helpful, or tactics puzzles helping a lot for pattern recognition, but there's no "fast" improvement.
Now if you're looking for efficient improvement, then that's a different thing entirely.
I was just wondering if any of you guys could give me tips to get high rankings fast in rapid