make sure you do your best to not allow your kids (present or future) to not have to go thru what you went thru. He's dead now, however he was probably dead to you long before he was diagnosed with cancer. Pour out a little liquor, holler a big "fuck you, muthafucka" preceded with a "Rest in Peace", then tell whoever raised you that you love them.
maybe you tell them you love them before the drugs & alcohol tho.