Audience awareness plays a huge part in plain language. You need a detailed picture of your audience for your team to create, commit to and use throughout the project. Personas involve drawing pictures or creating profiles of your audience using research on their lifestyle, cultural, social, professional and personal activities and values. I find it a fun activity to open a training activity or for team building.
Usability.gov has an excellent description of how to do personas.
Integrating plain language guidelines into an existing style guide or creating a stand-alone guide is a great investment with a long shelf-life. Focus on jargon and simple words that can replace your organizations in-house jargon. Everyone appreciates a writing resource. They save time, create shared techniques, enhance peoples’ skills. Integrating it into an existing style guide increases its value and can be a great stepping stone to a learning event.
BC Government website shares content style guides.
Plain language checklists are available online. Most are very generic. Get your communications and plain language project team together to brainstorm a checklist specific to your task, audience or organization. This increases colleagues’ understanding of, skills for and commitment to plain language.
Plainlanguage.gov offers a checklist guide.
Without embarrassing or intimidating anyone, carry out a plain language audit. Gather a team and collect a variety of documents or information sources and measure against selected plain language guidelines. Share the findings and as a group come up with recommendations. You'll be coaching and training people throughout the whole process.
IABC (International Association of Business Communicators) shared this guide for audits.
Awards offer several opportunities for learning and committing to plain language. It helps see what the standards are in the profession. If you are recognized, you have motivation to carry on with your plans.
PLAIN (Plain Language Association InterNational) offers members ($60/year) opportunities to be recognized at its conferences. Other organizations offer annual awards.
PlainLanguageAcademy.com has core and advanced courses that cover the whole process.