I use the shampoo, conditioner, serum, etc, etc, etc...
A bit pricey but I get mine off ebay for about a 3rd of what I would pay at the salon.
(failing that u could try smearing mayonaise over your hair covering it in clingfilm and washing out the next morning...yeeeeuch...but it's supposed to be brill - except that you'll smell like a salad!
Get a good shampoo, Herbal Essences Fruit Fusions one for shine is very good.
Rather than deep conditioning and weighing the hair down with more product get a light leave in conditioner which you can spray through your hair before combing out and drying.