There are plenty of Finnish 'flashcard' sets in this page
http://quizlet.com/subject/finnish/ .
There are several ways of learning the words in the sets:
For instance
Familiarize works as flashcards, basically showing you the words.
In the
Learn option, you go through the set of words writing them. At the end of first round you can see which you got right and wrong. Then when you choose to continue to the second round, you will have to get the remaining words right. It continues like this, untill you get them all right. This is my favourite because you use the energy where it is most needed - on the difficult words.
There is also the
Test option where you can make you own simple tests-, multiple choice, true false and just writing
Finally there are the
Scatter and Space Race 'games', where the last mentioned at least is a quite fun way to get to be able to use the words without having to think about it first, because it is a time limited and a bit stressing challenge.
You can make you own sets and share them with others if you wish, and/or the ones other people have made. There are some nice and simple import and export options for adding many words or sentences in a fast and easy way.
You can also join groups made by other finnishlearners to get access to even more sets
For instance this one
http://quizlet.com/group/49255/
