I myself haven't had any reliatives diead-yet-so I don't think this will help much.
Be sure to tell him that you love him dearly, and remember that he will be in a much better place. No stress, no bills, just eternal life with God. Depending on your religion, of course. =/
EDIT: Letting out your tears is good for your health. So is laughing. Always try to push bad thigns aside and think of the positives(^).