Do label things in your apartment-- and not just the obvious labels such as 'pencil', 'pen', 'cat'. When my housemate Thrud was studying Italian, we had little cards taped to everything: on the fridge was 'Where is the olive oil?'; a cupboard said 'We need more pasta'; the outside of the bathroom door said 'Where is the bathroom?' and the inside said 'It's right here!'. As a result, I can use the construction beginning 'Dove il' although I have never studied Italian and although there was no English on the little cards. Put things on your calendar in the language. Leave the labels up for months. Tell your guests what they mean. Go wild making labels that both use significant grammatical constructions and are things you'd like to say ('How many metres till the next picture of Sanzo?' 'Should this bookcase contain more manga?'). This is the best way I've seen to approximate some degree of immersion, especially if you repeat the phrase aloud every time you see the card. In addition, if you're a kinesthetic learner, writing out the cards should be helpful in itself.