For glossy, shiny hair

If you have dull, lifeless hair and are looking to bring on the shine, then simply use the following rinse after shampooing your hair -

1/2 cup of plain tea (unsweetened and without milk obviously)

A generous squeeze of lemon juice

After you are done shampooing, take a jug of water, and add the tea lemon mix to it. This will dilute the mixture and allow you to rinse your hair nicely. Then use this as a final rinse to your hair and that's it.

You might be uncomfortable with the idea of leaving tea in your hair; I used to feel the same. But after I started seeing how soft and shiny my hair would be after drying, I didn't mind as much. The half cup of tea works fine for shoulder length hair; use more or less depending on how long your hair is. If you find the mix is still too strong, then dilute it more with water and then rinse as usual. 

A word of caution though. Your towel would stain when you dry your hair with it. So keep one towel aside just for this. And you might want to use a dark coloured towel, instead of a white/cream coloured one.

Do this once or twice a week for best results.