There is an article at the top of this topic called grounding techniques. You have to scroll through it a bit to find the information. The link at the top doesn't work but someone posted all the info inside the article.

Also, I think you need to be more specific in what you want to cope with. PTSD encompasses a wide variety if symptoms. You might post what you are feeling to get some feedback as to what you are struggling with. Then you can work on coping with it.

For example, if you feel like you are always having to watch out for something bad to happen, you may need coping skills for hyper-vigilence. If you are having trouble breathing, you may need coping skills for panic attacks.

Hope this helps.