Last month someone pointed to this Emacs Notes post from last year and I thought some of you might find it handy. As the post points out, syntax highlighting can be a wonderful thing but sometimes you have a weird or custom file format for which no highlighting has been implemented. The author gives a simple example of this and goes on to show how to implement your own custom highlighting.
It probably seems as if it’s not worth the trouble most of the time but once I got used to having syntax highlighting, files seemed “dead” without it. If you have files in strange formats that you use more than very occasionally, you should read over the post to see if it’s worthwhile providing some highlighting.