What does commitment mean? It should be a daily goal: reaching a certain word count, writing for a set amount of time, or finishing a scene or chapter. Word counts are especially effective in keeping your progress going. Stephen King recommends 1,000-2,000 words/day in On Writing, and the standard for NaNoWriMo is likewise 2,000. I’ve used 2K words/day as my go-to for most first drafts. But if you can’t fit in that much, that's ok. Do 500. Commit to 45 minutes each day. Sit at your desk and finish your daily goal, even if what you're writing is terrible and you hate it (which happens to us all on a regular basis). You can (and will) fix it in rewrites.