It is easy to look at the struggles and challenges of life and forget to see all of the things that make each day a positive experience. One of the best practices is to set aside a time of day to look at the past day and decide what it is that you are grateful for.
Once I looked at life and only wanted the good things in my experience. I think everyone would feel the same way, no sadness, no loss or grief, just happy things that are easy to deal with, yet we all know that life is not going to come as easily as that. We all must go through some difficult times and I think that is OK because you will never appreciate the good in life unless there is the opposite aspect to compare it to. There is always a flip side.