For the main part, if you have food and a source of water in your backyard for your little feathered friends, then you are already off to a good start.
For attracting certain birds you will need certain types of food. As each breed has its own preference.
Depending on the type of food you will need a proper bird feeder, if you are using bird seed, then you will need a tube feeder or hanging feeder. For Suet Cakes, you will need a suet feeder, and for that sweet syrupy stuff that hummingbirds love you will need a humming bird feeder. (My personal favorite is the strawberry hummingbird feeder.)
At Red Hill General Store we carry several varieties of Bird Food including seeds and suet cakes, each blend attracts a variety of birds to your yard.
And a photo a Red Hill Employee got of a Woodpecker on her backporch:
Have fruit trees that you'd rather not have birds in? Read How to keep birds out of fruit trees.