This morning i chose to focus on an imaginary object. I sat with a straight spine on the edge of the couch with the timer set to 5 minutes and imagined myself on the beach. I went into as much detail as i could. I saw the vast ocean and a large piece of driftwood, heard the birds in the sky and the sound of the waves crashing on the shore, i felt the sand beneath my feet and the warm air on my skin. I tried to imagine what it would smell like and taste the saltiness of the air.
Unfortunately, that didn't last the whole five minutes and i found myself not only drifting but anticipating the alarm again. (The purpose of the alarm was so that i didn't have to worry about the time)
It's not supposed to be easy, though. That's why it's called a meditation practice.