So, you want to make some High Quality thumbs but you do not know how?! Ok...I will show you...get ready to make your biz better!!!
Let's start...We will use this photo, which one I borrow from
http://thumboom.com/samples.html ... I hobe that will not be a problem...still this is only for education

Ok, download this photo:

Now, opet it in PS. First of all you need to "Despeckle" this photo...so go to Filter/Noise/
Despeckle and do that two times.
Ok after that go to Image/Adjustments and click on
Auto Level and
Auto Colour.
Ok now we can resize our picture, we need thumb right?

Ok, so go to Image/
Image size and put there something like this:

Ok, now when we have our thumb lets move to the next step. Click on Image/Adjustments/
Brightness/Contrast and put there 30 for Brightness and 30 for Contrast.
Ok, now we need to sharpen some edges so click on Filter/Sharpen/
Sharpen Edges
Now click on Image/Adjustments/
Curves and click one on that line and put there 80 for input and 110 for output, like this:

Ok, when you do that click on Image/Adjustments/
Colour Balance and put 20 for Cyan, 15 for Magenta and 10 for Yellow. DO THIS ON EVERY
TONE BALANCE (shadows, midtones and highlights).
Ok, final step, click on Image/Adjustments/
Match Color and put 60 for Luminance, 110 for Color Intensity and 100 for Fade...DON'T FORGET TO CHECK
Naturalize FIELD!!!
If you follow all this steps then you need to have something like this for your final product:
Ok...samples:
Enjoy
