Don’t stop feeding the birds, they are going to be a great help against insects, so you want them to stick around.
Show a heart for birds and put out birdseed and water for them, the cold makes it hard for birds to find food right now.
Do the birds a favour during winter and stock up on birdseed, it is possible to attract certain birds with certain food.
Do not forget to feed garden birds: you could make bird cakes! How to make them: http://bit.ly/wXOoYh