Theresa's book

You are also advised, when first learning a character, to be conscious of all the radicals that appear within it. Say aloud the radicals while writing a new character. For example, say "knight-eye-cowrie" while writing 賣 "sell", or "grass-mouth-mouth-dove-yawn" while writing 歡 "to be pleased". Such incantations may be of considerable help in recalling characters to memory three of four days afer first encountering them.

Quoted from "Reading and Writing Chinese" by William McNaughton and Li Ying.
Thank you Theresa!