dyed hair care tips?

Well if you've got those products you're pretty much set :)
Just try to stay away from putting your head under sea water (or any salted water), and chlorinated water. Seriously. Stay away from those! Otherwise it will fade drastically.

Don't worry if your hair fades just from washing it normally after a day or so. That's what happens, it'll always turn out a bit lighter than the packet.

Lucky you get to dye your hair I'd have to bleach mine a couple of times before I could even get it a lighter color. And I really don't wanna do that.

Tips?
I'd say stay away from heat and try not to wash your hair to often.

If you're coloring it yourself, run a bit of conditioner around your hairline. It will save you a lot of scrubbing later if it gets on your skin and colors it. And since it's your first time make sure you do the allergy test on a lock of hair first. I knew someone who tried for blond and wound up a scary shade of green when she colored hers the first time because she didn't do the test. :)
Other than that . . . just go easy on the shampoo for the first couple days to avoid too much fading.