Improving Passage Organization

Read the following passage:

Many people find it difficult to stick to a regular exercise routine. To overcome this challenge, setting specific goals can be incredibly helpful. For instance, instead of saying, 'I want to exercise more,' a clearer goal would be, 'I will walk for 30 minutes every day after dinner.'

In this context, which of the following sentences, if added after the last sentence, would best improve the organization of the passage?