Taking one day at a time. Starting a journal has helped me by emptying my thoughts on paper. I can then go back and read how I felt then and realize my progress.
The most important thing I have found is to keep reminding yourself of the wonderful memories you can always treasure. Most importantly you have to allow yourself to live for the living! Don't be so overwhelmed that you lose sight of those who are still around you. Pets truly are family members!
I have lost a loved family member of a 15 year pet. To make the decision is never taken lightly but one needs to consider the quality of life. They can never really be replaced but I treasure the times he was in my life and enriched life for me.