The title tag is a very important seo resource. There is not a certain recipe for 100% title optimisation, but it`s recomended to have a title with the length between 40 and 65 characters, no stop words, keywords in title, and a decent relevance between title and the keywords you are promoting and your content.Description:
Meta description tag is a usefull method to describe the content your page is hosting. Avoid having same descriptions on all your pages. A proper meta description has a lenght of 150/160 characters at max, a decent relevance with the keywords you want to promote your site with, and, ofcourse, keywords in the description.Keywords:
Altough the meta keywords are ignored by major search engines like google or bing for some years now, some seo experts claims that they still play a role in on page optimisation. It`s recomended to have a number of keywords between 5 and 9 and a decent relevance report.