17P/Holmes is now obviously non-stellar to the naked-eye and is quite easy to see in the northeastern sky after 8:00 p.m. or so. At that time, the comet is to the lower left of Mirfak (Alpha Persei), the brightest star in Perseus. It lies roughly between the bright first magnitude star Capella, which is close to the horizon, and Mirfak.
The comet is a bit closer to Mirfak now but the finder chart posted
here should still prove useful to you.
There are other charts at
http://www.cometchasing.skyhound.com/comets/17P.gif and
http://www.astronomy.com/asy/default.aspx?c=a&id=6183
Dave Mitsky