Encourage your child to count, recognise and write numbers as much as possible.
Practise writing their name forming letters correctly (using the set 1 sound map below and flash cards to help). Set 1 Flashcards
In Reception, the children start the basics of reading by learning the sounds. Your child will benefit from you listening to and reading with them daily. Oxford Owl has free eBooks you can use.
You can also practise set 1 sounds with them using 'Jolly Phonics' (which is available for free on youtube).