My Father once told me, "Son, if you do not have enough time to read, then you do not have enough time."
As a bit of an insomniac myself, I find I have plenty of time to read each night. My fiancee and I frequent the local used book stores and I find you can get a whole fistful of classic Sci-Fi paperbacks quite cheaply as many are sold at their 70's-era cover price. (And they inflation only helps the banks! ;)