I ran across an idea on Pinterest about writing strategy rings. This summer I decided that I'd implement them this school year. Every time my students take a writing prompt through the entire writing process, I conference with them. We do this at least twice a quarter.
I have students bring me their completed writing and they read it aloud to me. As they're reading I'm grading it using my district's holistic writing rubric (it focuses on the 6 Traits). When they finish I decide what trait I want the students to focus on and I write a note card with that strategy (see photo above with white card including Voice and Sentence Fluency Strategies). I add that strategy to a metal ring.
Students frequently refer to their Writing Strategy rings during writing workshop. The next time we conference they bring their ring and after they finish reading their writing we talk about their specific strategies. I might ask "Can you show me where you used voice in your writing?" If they've used the strategy, I write the date on the back of the card, if not, we discuss it and hopefully they'll use it next time.