I have read that a person should reach stillness in each position before moving on to the next position in prayer. Is it required for a person to be perfectly still to achieve stillness? Can you explain what is meant by stillness? I often have a difficult time reaching stillness due to breathing, recitation and adjusting to make sure the necessary body parts touch accordingly.

What is meant by stillness is that there must be a break/pause between various prayer parts. For instance, when you raise your head from ruku, you must stand upright for like a second before going to sujud. Some people raise their head from ruku and without any pause go to the sujud. This should be avoided.