I use Anki http://ankisrs.net/. That's a program based on idea of spaced repetiition. Besides I try to remember whole sentences rather than words. To get even more sustainable result, take this word and create some new sentences with it. I tend to be lazy with it but if the word especially hard to remember do it.
1 maart 2015
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Heb je je antwoorden nog steeds niet gevonden?
Schrijf je vragen op en laat de moedertaalsprekers je helpen!