Radical 纟
6 strokes
纪
thread 纟 (233a) + self 己 (271) = discipline 纪

(A driver is trying to develop good habits) He ties some color-coded threads round the controls to encourage him to be more self-disciplined with his driving. / The dwarf won’t rent him a jeep until his driving improves.
This character also means an “age” or “era”.
年纪 (168) niánjì age
[纪念 (167) jìniàn commemorate]