Isolate the infested plant
Inspect leaves, stems, soil, and undersides of leaves
Remove visible bugs by hand
Rinse the plant with lukewarm water
Wipe leaves and stems with a damp cloth
Prune heavily infested leaves or stems
Treat with insecticidal soap
Treat with neem oil
Use rubbing alcohol on cotton swabs for small infestations
Replace the top layer of soil if needed
Repot in fresh sterile soil if infestation is severe
Use sticky traps for flying insects
Allow the soil to dry appropriately between waterings
Improve airflow around the plant
Quarantine new plants before placing them near others
Repeat treatments regularly until pests are gone