Pema Chodron hits it out of the park once again:
Once on retreat I was reading some traditional text that talked about bliss and special experiences, and I began to feel wretched. I felt poverty stricken about never having had any experiences that felt like bliss, clarity and luminosity. I began to feel depressed that I didn't measure up to any of these glowing words.(from Start Where You Are)
Fortunately, I put that book down and picked up something simple about just being alive with who you are right now -- nothing special, no big deal, ordinary: just keep your eyes open, keep your ears open, stay awake. Those simple instructions began to cheer me up, because I felt that I could follow them.