Keywording can be a tricky job for beginners.  It is tough to come up with effective keywords and important to embed them in your IPTC file information tosaveyourself a lot of time in the future.

Getting the keywords

Take this image for example:

A simple way to make sure you don't forget any keywords is to answer the questions who, what, where, why, and when.

who: rock climber, woman, female, girl, person, 

What: rock climbing, sport,extreme

Where: cliff

Why:activity, sport, fun, hobby,

When: summer

Then you may also want to consider some concept keywords such as: risk, danger, dangerous, fear

 Embeding the Keywords in the IPTC Information

To save yourself a lot of work in the future, you should imbed your keywords, as well as the title and description in the IPTC information.  To do this you can probably use your favorite editing program.  The most popular editing software such as iPhoto, Lightroom, Aperature, Adobe Bridge, and Photoshop all of resources to do this.  If you are just starting out and don't have access to any of these programs, another option is Microsoft PhotoInfo. It is free and works very well.

Here is a video tutorial on editing your keywords with photoshop from thesupe87