Do not leave the person in grief, stranded and left out. Stay close to individual and always take the initiative. Tell the person that you will call or get back to him/her. Do not tell the individual to call you because that will create doubt in his/her mind over your intention even though your intentions are at the right place. If the person in grief calls you, make sure that you are there for him/her. A person in grief has a highly negative outlook towards life, if you have gone through it, you will understand this fact. Make sure that you are there to comfort your friend.
If you do not know exactly what to say, then the best thing you can do is to stay silent and just listen to your friend in grief. Sometimes listening to somebody is the best solution. Listen to what your friend has to say, keep on nodding and encourage him/her to have his/her say to the matter. Let your friend let out all that’s he/she has kept inside of him/her. This way he/she will feel light hearted and feel better.
Never relate your experiences with what your friend is going through. No matter what experiences you have had you still do not know exactly what the person in grief is going through. This is the reason why you should avoid using clichés. Not only clichés are annoying, they are meaningless to someone who is going through a loss of a loved one.