Some advice: resist the temptation to make information too visible. For example, it's tempting to make flash cards with lots of information on them. Similarly, your software might display words along with lots of information about them. It's better if it doesn't. What makes your brain retain things is being forced to recall them. This seems to flag the information for longer term storage. Hence the Leitner system. It's important to go throught the painful effort of recalling the meanings of things and all sorts of stuff associated with them, rather than simply repeatedly looking at that information.

Recalling words in real conversations has a really strong effect, which is one of the reasons that language exchanges are great.