Vosene is one of the few that will really clean your hair of either product build up or day-to-day (or night) smells.
For any hair colour I've ever had, I love Pantene�s Ice Shine. A really good boost though is to coat your hair in olive oil, don't worry about virgin or extra you're not eating it, and then sit with your head in a plastic bag for about four hours. If you can really bear it, wear the bag overnight. It is amazing. You just wash it off with whatever shampoo - e.g. Vosene. If you want, follow it with conditioner, but see how your hair is first without it then try conditioner next time you do it if you weren�t happy.
Another favourite for blonde hair is whole egg whipped with honey - use water to make it into a usable paste. Leave it for half an hour, then wash it off using shampoo, and follow with a leave in conditioner if you feel you need it.