Hoppe's No. 9 for general cleaning
Sweet's 7.62 for copper fouling, followed by Hoppes to prevent bore damage
Hoppe's oil soaked on a patch through the bore after all of the above
Rem Oil on the sliding contact areas of my semi-auto pistols

Honorable mentions go to Shooter's Choice Copper Remover, and especially to Birchwood Casey's 2 in 1 Bore Cleaner, which removes copper and nitro fouling. Sadly, I have not seen 2 in 1 for sale in a long time; I imagine it has been discontinued.