Ming @ Agents of Speech explains how parents can reverse speech delay in their kids with just 15 minutes daily. Short, focused sessions work better than long stretches, and you don't need to overhaul your routine to see results.
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A lot of the times children don't have the mental capacity or the attention span to actually sit and listen to you for extended period of time. It really is a very small investment of time. We've actually done this with parent coaching. We have a group of parents that we receive and accept every now and then. We tell them, okay, only 15 to 20 minutes that you should do this activity. Other than that, don't do it. Just do whatever you're doing at home. Allow them to do whatever. And I want to tell the parent that you can do it as well. It doesn't need to take up the whole day. You don't need to quit your job. Although a lot of parents nowadays are very committed and they decide to quit their jobs to go full on with their children. And I'm just giving a caveat here.