Proper meditation is very important for you. You must observe daily the timings given. This will help to stabilize you, and your mind will remain clear all day long.
Do not worry for the world. Your own problems are enough for you to solve. If everyone concentrated on problems of the world and did nothing to further his own growth, what would become of the world? Practice what you believe in. If you believe in proper diet, institute this in your daily life. If you believe in yoga, meditation, whatever you see as important for development of mind, body or soul, do this. Speak less about what you do. Let your example guide others.
On the other hand, do not become so obsessed with your own difficulties that you do not see the problems of others. Simply, the more you improve yourself, the easier it will be for you to help others.