My Father passed away on 4/29/06. He was 77 and was suffering from COPD; that day his heart heart finally gave out. A few days after his death, I was talking to my sister-in-law and she told me that a few weeks before my Dad passed, the last time she had seen him, Dad called and asked how my niece was and asked when they would be coming next because he had not seen her in a while. It was quite a coincidence that my sister-in-law was home, she was usually at work, and also she was off work that weekend and was thinking of taking a drive to my parents' house. They came that weekend and my Dad spent the day with his pride and joy, my niece. That was the last time he saw her.
There was some weird things that happened, but we only realized after the fact, around the time of his death. The day my Dad passed, we received a call from the hospital at about 9:30 AM. He was requesting that his wife come to the hospital. I drove my Mom there and my Dad requested to leave, he looked rather scared. He then asked me for some coffee but I could not oblige due to his condition. My Dad said that if he didn't leave, he was going to die and I advised him if he did leave he WOULD certainly not make it. At that point he asked to be put back on assisted breathing and we agreed he would be more comfortable. My Father, who was not very religious, began blessing himself repeatedly and looking more and more "concerned". As the doctors were switching him back to the machine, he expired.
A month after his passing, my Mother decided to make some changes around the house. She painted the living room and was very upset and concerned that my Father would not approve. Also, I had recently bought a dog which my Father had forbade me from getting for a decade or more. That night, as I slept, I saw my Father sitting on his recliner in our living room. On his lap sat my new dog, Murphy, and he spoke to me. He said, "Tell your Mother the walls look good..."
Though none of these fall under the standard definition of a ghost story I thought that my experiences did give more examples that there is something else out there when we move on. And there is more than one way for our friends and loved ones to contact us.