Meditation can take on many forms, from simple Grounding all the way to Transcendental meditation. Every kind of meditation is designed to help you relieve stress and focus on the now. I was always told that depression was looking back, and anxiety was looking forward. That is not always so, but that concept helps remind me to focus on the now.
Grounding meditation is when you notice the things holding you up and the air flowing in and out of you with each breath. Let your thoughts move through you without judgment and without fixating.
Another form is Focused Meditation, where you try to focus on just your breathing. Gently let wandering thoughts go and return focus to your breathing. Eventually, you will stop even thinking of your breath and find yourself in a place of peace, where nothing is running through your head - just the quiet of the now.
Insight Meditation is when you use the practice of meditation to develop qualities in yourself. You set an intention of what you want and focus on it throughout your practice.
Body Scan: This is when you focus on your whole body - the sensations, the feelings, the tightness, or discomfort - and slowly move your focus from the top of your head to your toes. It can do wonders to help your muscles relax without moving at all!
There are so many more, what kind of meditation do you like?