i always add a can (or 2) of engine flsuh, then warm it up at high idle (2000rpm) for 15mins, with occasional blasts to higher rpm to increase oil pressure and remove the loosened gunk.
i also leave the sump plug out while i remove the oil filter because the act of turning it can cause it to leak dirty oil back into the sump.
a "kerb-it" recycling bin lid makes a handy drip tray if you dont have one.