techniques

1 - Setup telescope and computer.

2 - Find and center the object in the eyepiece.

3 - Replace the eyepiece by the webcam. Use a Barlow lens to increase the image size if necessary.

4 - Start capture software ("QCfocus" is an excellent capture program).
Select maximum resolution supported e.g. 640 x 480 and no compression.
Select a low frame rate. The lowest frame rate produces the sharpest pictures. Higher frame rates cause compression of the frames with loss of information. 5 or 10 frames per second will give the best results. Adjust brightness, gamma, saturation, exposure, gain, white balance etc...

Here are my personal settings, try your owns !

For the moon: 10 frames/sec - Mode black and white - Brightness, Gamma and Saturation at 50% - White balance auto - Shutter speed 1/25sec - Adjust gain (will depends on the albedo of the moon region).
For the planets: 10 frames/sec - Brightness 50% - Gamma 0% - Saturation 100% - White balance auto - Shutter speed 1/25sec - Adjust gain.

5 - Focus the image (A VERY CRITICAL STEP)
Go slowly. Take your time in looking for the best focus, and wait for a few seconds at each focus position to allow a moment of sharp seeing so you don't mistake poor seeing for bad focus.
Look for a distinct feature. For example, look for the Cassini division in Saturn's rings. Small lunar craters or peaks are suitable features to use when imaging the moon. Jupiter's moons are easy focusing targets for that planet.
Also not absolutely necessary, motorized focusers can be beneficial.

6 - Capture the AVI video files.
For the Moon, I capture videos in bursts of 30 seconds, at 10 frames per second, giving a total of 300 frames per capture. For Jupiter, I capture videos of 2min (1200 frames). How does a video look like? See below ...

7 - Select and stack the best frames
When very short exposures are used to freeze planetary details, the signal-to-noise of individual frames will be low. Noise is also grossly exaggerated when powefull image-routines are used. You will have to reduce this noise by stacking multiple frames.
About 50 to 100 are usually needed to average out most of the noise if you are imaging the moon. Many more can be necessary to obtain the best results on jupiter or saturn.
There are several programs available for automatically selecting, aligning and stacking frames. One of the best at this moment is "Registax".

8 - Post-processing
Unsharp masking, histogram adjustment, color balance etc...
By using an "unsharp masking" or a "wavelets" processing tool, you can bring out details from your images. But be careful, you may bring out false details from noise by using too agressive processing.
I am using "Iris", a very powerful software that contains a wealth of image processing functions. This is a freeware written by Christian Buil.