Write simple articles around a single subject and just split content into multiple articles if necessary.
For longer articles, use a table of contents like in this article to make navigation easier.
Make good use of images, GIF and videos
There's nothing like an image or an animated GIF to explain something. For instance, here's a GIF about sorting topics in Timelapse. sort-topics.gif 53.67 KB
Or here's a 2-minute introduction to Timelapse.
It's much easier to get the message across in these scenarios with a video or a GIF than with words.