Achieving peace of mind begins with finding an inner peace that can be achieved at all times, not only when a person actively participates in meditation to find it. True peace is something that is within always.
Some simple ways to achieve the inner peace you are looking for can come from other places, not only mediation.
Spiritual Exercise
Practice spiritual exercises and develop strength and understand of adversity.
Practice gratitude for everything in your life
Even for the adversity as it is a lesson for growth. External gratitude leads to inner peace.
Practice the positive affirmations about yourself
Look for the positive in everything and everyone around you. When practiced, a warm glow of inner peach will fill your insides.