Now that I come to the end of my own DELTA journey and I would like to share my experience with all you potential DELTA-ers out there in the hope that it helps you.
The order in which I did my DELTA was Module 1 – Module 3 – Module 2. There is no set order in which you need to do the modules, and I found that the way I did worked very well for me. While preparing for Module 1, I read a wide variety of books and as a result, developed a good understanding of a whole host of teaching issues. With Module 3, I got good at academic writing and the whole drafting/revising/re-drafting process. All of the above came useful during Module 2. It was by far the most intensive of the modules, mostly because in 1 and 3 you can pace yourself and space out the studying/writing but in Module 2 there is no time to pause – you are always writing assignments or planning lessons or panicking about how much you have to do and stress-eating cheese (true story).
Module 1

A very blurry photo right before the exam – I was vibrating with nerves!
I took my Module 1 exam in December, 2014 and I got Pass with Distinction. To prepare for the exam, I took an online course with ITI Istanbul. It was conducted via Moodle and there were lots of useful links and how-to guides, including ‘What to do first’. Our exam practice papers were graded promptly and we received constructive feedback. One great thing about the course is that when the time comes to register for the exam, should you decide that you are not quite ready yet, you can enroll into the next online course free of charge. Another useful feature was the forum where you could post all your silly questions and concerns which were answered by your peers and tutors. I outlined some tips for Module one specifically in this post.
Module 2