resize...use the program you open the picture with or something like microsoft office picture manager...i resize all my pics there...pretty easy...just open the pic in manager, in toolbar there is an edit pictures button, click on it, select resize, then under predefined width x height select web large or small, those are the sizes i use, then select ok, then!!!!!!! make sure you save it! if you dont save, when you open the pic again, it will be big again.....
first pic is saved as web large, second web small