1. In a gradual manner
   - gradually, bit by bit 
2. Proceeding in steps
   - stepwise

1. One thing at a time
   - bit-by-bit, in small stages, piecemeal, stepwise

See also: gradual

Encyclopedia: Step by step

• white man
• white man's burden
• white mangrove
• white marlin
• white matsutake
• white matter
• white meat
• white melilot
• white metal
• white milkweed
• white mountain ash
• white mulberry
• white mullein
• white mullet
• white mustard
• White Nile
• white noise
• white oak
• white onion sauce
• white pages
• white paper
• white pelican
• White people
• white pepper
• white perch