A mouse in the house!

So I thought I was safe. It has been about a year and still no mice have been spotted in my house. Then I moved up the hill and have HUGE gaps between my floors and the bottom of the doors. Tonight as I sit here on my living room couch working on the computer I watch a mouse run from my bed room down the step and under the couch where I sit. And no matter how I move it around it will not come out. So... I think its time to suck it up actually get off the couch instead of being lazy and just making noise trying to scare it out and move the couch and try to catch the mouse. Wish me Luck.