As with most things in SEO, the correct answer is…’it depends’. META Description is not really an SEO thing as it is more a marketing thing. You create a meta description based on what best translates to actual traffic. You can test this through A/B testing, using Amazon’s Mechanical Turk and a varied array of other ways.

SEO Title (i’m assuming to actual Title and not META Title), depends on niche and targeted keyword phrase). You can often get a good idea of what a page’s Title should be by looking at the desired keyword phrase to rank for and what your direct competitors’ are using for their Titles.