I went red several years ago (from a strawberry golden blonde - not my own) - and I've never looked back!
I'm glad you're doing this at the salon for your first attempt! If you find you don't like the shade, let the stylist know. You might need to play around with it the first few times to get a shade you love.
TRY NOT TO WASH YOUR HAIR FOR THE FIRST COUPLE OF DAYS AFTER YOU COLOR. Get yourself a boar-bristle brush (Sonia Kashuk at Target makes some great ones), and brush brush brush to re-distribute the oil in your hair.
I read somewhere that you start losing the red color when you step out the door of the salon. Very true. I found it was very pricey to keep coloring at the salon, so I started coloring at home. I do my color about every 2.5 weeks (when my roots start to show). L'Oreal Feria has been my favorite to date, I use a copper color, because about 7-10 days in, the real red fades, and I still have a coppery red brown that people think is my real color.
I went to my locally-owned beauty supply store, and bought a set of hair-color brushes, which I use to get the color into the roots. I think I pay around $6.99 for these, and I replace them probably once a year. These stores usually sell inexpensive smocks, but I normally just wear dark 'junk' clothes.
(If you do eventually color at home, Head and Shoulders shampoo removes dye from most surfaces, if you clean it up immediately and don't let the dye dry. Don't use it on your hair, it will strip the color right out!)
Some things I should note: I shampoo every 2-3 days, depending on the humidity, and physical activity. I don't use any conditioners or products with silicone or dimethicone, and this makes my hair stay cleaner. I brush brush brush every day with a bristle brush, 100 strokes. If my hair is looking fuzzy, I wet it, condition the ends, rinse, and style, and it usually comes out soft, but not greasy.
Sulfates are a NO-GO for red. Don't let the salon sell you the $20 bottle of "Oh this is perfect for your red hair!" shampoo, because chances are, it will wash the rich red out. I found that any Aveda product (shampoo AND conditioner) either changed the red to pink, or stripped the red right out. Same with John Frieda.
The Giovanni line (they sell it at Target) seems to keep the color in really well, and it doesn't have silicone-based ingredients.