There never seems to be enough time to fit everything in. One way I am attempting to fit in writing and grammar instruction into my ESOL groups is through using a dialogue journal. Students have a writing prompt that they respond to. I then will write back with a question or comment. Students have the options of continuing to write back a response.
I am also integrating short grammar reviews into the writing prompts. This allows student to focus on a skill and immediately apply it in their writing.