First off I try and shoot a piece of white paper in the light I am shooting and do a custom white balance in the camera. I have heard that shooting green grass works well too, although I have not tried that method.
Also when shooting IR the camera likes sky, water and anything with chlorophyll in it so try and get these elements in your images. Also I bracket expose in camera because it is really easy to blow out the highlights in an image. More often than not the image I choose will be at -2 or -1 when shot in manual mode. I use the 50mm for shooting.
When you have your image in Camera Raw I use the white balance dropper and place it on part of the image that I think that is close to middle green. This will usually change your colour temperature to 2000K and change the tint dramatically (it will end up in the green side). Now open your shot in the editor of your choice. I then run the
image through a noise reduction program. Then I run the photo through an
action from here http://khromagery.com.au/resources.html
You can download this and add it to your actions dropdown menu. (This
site also has an excellent write-up on IR so it is worth
reading. It recommends lenses and cameras that are best for doing
IR. ) The action will swap the red and blue colour channels as well
as adjust contrast, and hue and saturation. Finally if the image
needs a colour boost I adjust in LAB. The more you practice the
better you will get at converting. I find it helpful to have sky in the
image, then I know how far to adjust the hue slider. Anyways, happy