So sleeping is divided into many smaller stages, which I'm sure you know. The two stages that are most important are the REM cycle, and the pre/post REM cycles. in Pre/post REM, our bodies are repairing and restoring energy reserves, and in REM our mind processes information gathered throughout the day.
So, in order to ensure that you are getting well rested with less sleep, you need to get into those two cycles as quickly as possible. Meditation in and of itself lowers stress levels, and allows the body to repair itself on a much faster level, so practicing simple daily meditation itself should help immensely. However, I know of no meditation that can get you into REM cycles faster. Instead, I might recommend using Binaural Beats or Isochronic Tones, with your focus being on Deep Sleep. Iso-tones is a website that hosts free isochronic tones, including one designed for deep sleep. Youtube also has many free ones, but they are made by individuals with far less experience usually.
You could also take up yoga. Since yoga streches the muscles, detoxifying them and relaxing them, it allows you to get through the pre REM cycles much faster, allowing for faster immersion into REM sleep, and therefore a "better" sleep with less time. Also, I highly recommend a diet low on processed foods, low on unhealthy fats, and avoid heavy protein at least 2 hours before bedtime. Processed foods and unhealthy fats are difficult to digest, and can cause you to remain in Pre REM for much longer than needed. Protein isn't difficult to digest, but it takes time for the body to break down, and the energy from it can make you restless during sleep. Instead, drink one full bottle of water before bed, and take a multi vitamin with it.