When it comes to meditating, my advice is to do what feels right.
If you look online, you’ll find sites that tell you to eat before you meditate. Others tell you not to. Some sites will stress the importance of sitting in a certain position, others will tell you to find a comfortable chair.
The truth? When it comes to meditation, it doesn't matter if you eat or don't eat. It really doesn't matter if you sit up or lie down or stand on your head - you just need to quiet your body and mind in the way that works best for you.
Also, there is no 'right" time of day to meditate. The best time is when you don't think you'll fall asleep (unless the purpose of your meditating IS to fall asleep).
There is no "best" meditation. One meditation might feel perfect for you while another feels uncomfortable. There are thousands of exercises out there from visualizing for relaxation or reaching goals or preparing for surgery to very passive mantra meditations.
The key is to find the meditation that works best for you – one that quiets your mind and body. When you find it, you will feel better, happier and calmer.