What ONE piece of advice would you give a teacher who wants to create their own classroom materials?

What ONE piece of advice would you give a teacher who wants to create their own classroom materials?

- Always put your target students in mind; consider their learning styles, interests and above all their needs when creating your materials.
- Share your materials with others and ask them to try them and give you some feedback if possible.
- Start small (one task, one skill or language area) and develop your materials till you create more professional materials and lesson plans.
- Don't forget to store your materials. You'll definitely need to use or share them later or even develop and improve them.
ooops, those are more than one, but I believe they just sum up the most important pieces of advice in my own point of view (a reminder for myself, as well) !