Experience means relating the meaning of the kanji to some personal experience that the kanji reminds the learner of.
1 I associate kanji with some personal experience the kanji reminds me of
e.g.1 顔（かお face）“顔 has three little strokes like 形 (かたち shape). I lived in Yamagata (山形) in Japan which apparently means ‘mountain shape’. So the design on your head, your face, is associated with ‘shape’ ” (student).
e.g.2 痛い （いたい painful） I remember that one because it’s got the radical for ‘hospital’ (病院) and also partly the kanji for ‘commute’(通う かよう) and I can only remember that because my boyfriend is a medical student and he commutes to hospital every day and it’s painful for him because he doesn’t like study” (student).
2 I learn a kanji if I think I’m going to need it in the future