The correct bike tools are a must, IMHO. Otherwise, you risk mangling parts...and knuckles!
These are what I use and have found to be especially serviceable:
Park Tool HCW-11 Slotted Bottom Bracket Adjusting Cup Wrench Tool 16 mm
Park Tool (109917) HCW-5 Lock Spanner
PARK TOOL (109916) HCW-4...