These are from Kaplan, but I found them really useful:
1. Parvo's Papa Adds Her Poxes to Hepa's (this one is sorta tough to remember) (dsDNA except parvovirus B19, which is ssDNA)
Parvovirus
Papovavirus
Adenovirus
Herpes
Pox
Hepadna
2. Call Pico and Flo To Come Righaway (+ssRNA)
Calicivirus
Picorna
Flavivirus
Togavirus
Coronavirus
Retrovirus
3. Pairing Rats Fight Over Bunny's Area (-ssRNA : Fighting is a negative thing to do)
Paramyxovirus
Rhaboviridae
Filovirus
Orthomyxovirus
Bunyavirus
Arenavirus