hey, I want to render a picture with a realistic reflection of the character i'm using. Something like a mirror would produce. I saw the reflection tutorial on this site, but it produces blurry images. What can i do, or where can i go to find this information??

Attached Link: http://www.cocs.com/poser/reflectp5.htm

Were you using the draft settings when rendering? The shading rate in the draft settings is too big for sharp reflections, you need to lower it to 1 or 0.5 to get sharp reflections. In my experience, mirrors with less polygons work better than ones with many polygons (for example, the single sided square renders much better than the cloth plane - and uses less RAM too).

I went to that place and it helped the renders, but they are still blurry. What can I do to improve the quality? I want some nice sharp reflections!?

they are not blurry they reflect also the light.. plugin the reflection node under the Alternate diffuse set the alternate diffuse to white color and the reflection to the color you wish and everything will working fine.. use also Production rendering as stewer explain for sharp edges.