Each person working AA may have a different way to practice step 11. The likely outcome is that they find an activity or ritual that helps them stay ‘centered’. It helps them remember their priorities, their core beliefs, and lets them refocus their attention for better decision-making.
The goal of step 11 should be to a continuous march toward spiritual improvement. It can be a challenge, though, to actually measure that improvement. An excellent way to do it is through journaling. Through journaling (which is in itself a form of meditation) you are able to express your thoughts, struggles, and honesty. They can also be used to look back on to see the challenges and hurdles you have overcome.
Other people may use a ‘mantra’ in their work of step 11. Many of the common AA mantras work well for this. Telling yourself ‘One day at a time’, for example, may remind you how much time you have spent in the program, what you’ve accomplished so far, that you only have to worry about your sobriety today, not tomorrow. A repeated reaffirming statement that reminds you about who you are, and your place in the world, maybe the most beneficial way for you to practice meditation.
The more obvious route may be to make a routine of prayer. Getting on your knees in the morning and at night (at least!) is a habit that can keep you mindful of your behavior and mindset. There is a danger in turning anything into a routine, but even that can be exposed through honest soul-searching during meditation!