I think feeling for the burr is one of the hardest things to do in sharpening. *One* of the hardest. 
I use two methods. First I use the "45 degree angle method" shown here:
http://users.ameritech.net/knives/ward.htm#four
That works pretty well, but honestly it can be a bit difficult. Strangely, I find that the pad of my middle finger is more sensitive than my index, and it (middle) can feel the burr more easily and effectively.
When doing this, I find it instructive to check both sides of the blade. That way you know what this particular edge feels like with *no* burr (the wrong side), so you have a reference. If both sides feel the same... no burr. I find that edge geometry can trick me into thinking I have a burr because it bites my finger.. but it bites on both sides on those blades, so I know there's no burr... until one side bites *more*. I hope that makes sense.
Second, I feel for sharpness in the conventional way: Running the pad of my thumb at a right angle to the edge, pulling *away* from the edge so the blade lightly scrapes across the lines of my thumb print. I DO NOT go up and down the edge. That would cut me. I go away from the edge.
I feel for sharpness this way pulling my thumb across the edge in one direction and note the sharpness. Then I spin the blade around 180, degrees, still edge up and feel again. This time I'm feeling the other side of the edge. Again, I note the sharpness. If it feels "sharper" in one direction than the other, I know that side has a burr. When they feel exactly the same, there's no more burr.
Using either of these methods, I like to check multiple spots on the blade to make sure the burr is forming on the entire length of the edge.
Brian.
I use two methods. First I use the "45 degree angle method" shown here:
http://users.ameritech.net/knives/ward.htm#four
That works pretty well, but honestly it can be a bit difficult. Strangely, I find that the pad of my middle finger is more sensitive than my index, and it (middle) can feel the burr more easily and effectively.
When doing this, I find it instructive to check both sides of the blade. That way you know what this particular edge feels like with *no* burr (the wrong side), so you have a reference. If both sides feel the same... no burr. I find that edge geometry can trick me into thinking I have a burr because it bites my finger.. but it bites on both sides on those blades, so I know there's no burr... until one side bites *more*. I hope that makes sense.
Second, I feel for sharpness in the conventional way: Running the pad of my thumb at a right angle to the edge, pulling *away* from the edge so the blade lightly scrapes across the lines of my thumb print. I DO NOT go up and down the edge. That would cut me. I go away from the edge.
I feel for sharpness this way pulling my thumb across the edge in one direction and note the sharpness. Then I spin the blade around 180, degrees, still edge up and feel again. This time I'm feeling the other side of the edge. Again, I note the sharpness. If it feels "sharper" in one direction than the other, I know that side has a burr. When they feel exactly the same, there's no more burr.
Using either of these methods, I like to check multiple spots on the blade to make sure the burr is forming on the entire length of the edge.
Brian.