This is a great technique that has prompts. You can buy books with ZenTangle ideas and kits. Plus they have a blog that has some really interesting posts.
"Doodlers Anonymous was founded to celebrate our addiction, and like any other, we're hooked. The need to draw, sketch, and doodle is constant. We doodle on almost anything we can find — pencil in a moleskine, marker on a napkin, ink on a torn receipt, sharpie on concrete. And we do it habitually — while on hold, in a meeting, during class, or while we should be sleeping."
It is free to join this site and there are some wonderful doodles on here. A treasure trove of ideas. They have featured artists and an email newsletter to keep you up to date on the sites postings.
You can doodle online and using a screen capture download it to your Desktop to save. ;)
"Print out as many as you want and please share them with others. These pages are perfect for all ages, kids to adult."
These are PDF coloring sheets and are free to download and share. Lots of great ideas on this site.
This site animates your doodles. It is fun watching the doodles and drawing come to life. :)
There are people that use use Moleskin sketchbooks to draw in. I have several and love them. All different sizes and kinds for you to choose from. There are sites just dedicated to Moleskine drawing. Here is a Flickr Group to post your Moleskine doodles,plus if you do a Flickr search there are lots of different doodle groups. :)
Doodle by Jim Bradshaw
If you have some doodle sites you would like to share, please leave a link in the comment section.
Doodle by Werdnus_Roo
Remember that National Doodle Day is March 5th!!