Unable to get Neat images in ACR

Guys, i always have trouble with the image noise
using a 60D with 55-250 most of the time
Always shooting Raw n using ACR to fix my images
Most of the time . i end up with the grainy photos. even with low ISO
luminance from 30 to 40 fix the noise issue most of the time. but it kills the sharpness. then using sharpness to sharpen the image but it's still not that neat.
Most of the time , Noise in Bokeh makes image terrible
anybody there to help me learn this thing please ?
youtube videos are not helping at all

We need to see an example or two. under exposing an image can cause noise, so it could be several things. Post a pic so we can help

Using the phrase "fix my images" as opposed to process my images raises a red flag. Are you boosting exposure?

Are you underexposing?

well ,, sometimes underexposing a little, Sometimes overexposing.
i believe that's because i want to boost the contrast on most of my photos.
u guys can have a look at http://www.flickr.com/​photos/faysalsphotogra​phy

Flickr isn't loading for me right now, I had a quick look at facebook. I couldn't see any noise at all. I suspect the issue is either your low tolerance for noise, or the image viewer you're using.

Judge noise by an 8x12" print, not in Photoshop at 100%.