1) Use it as a warm-up for any of your lessons in December:    

- elicit some words which your Ss might struggle with (e.g. soothing bath or pamper)

- ask them whether they are in need to do any of these activities. Let you students explain themselves and give reasons. On this stage you can revise modals (e.g. I must/should/need to ...), and ways of expressing wishes (e.g. I wish I could ..., I wish I were ..., I would like to..., I'm eager to...). 

- ask your Ss to add more activities if possible, help them with emergent language. 

2) Use it as a warm-up for any of your December lessons, use all the intructions above, but make it a hook for your future Christmas lesson. It will give your Ss a sense of knowing of what is going to happen and make them wait for your themed lesson more. 

3) Use it as a part of your Christmas/New Year lesson using all the intructions above.