Well, the first thing you should do is brine it. If you're not going to cook it whole, you could just brine the breast. The rest of the chicken is fine with or without brining and whether or not you do so depends largely on how you're going to cook the chicken.
Edit: Just reread the OP, and yeah, brine it.
Edit2:
Good, now you actually have time to brine it. Get a pot of about 3-4 quarts of water. Put in some seasonings (I vary what I use in mine very often. Things like Terragon, bay leaves, and thyme are good places to start. Be creative from that point. Boil the water with the seasonings in it for a half hour to an hour, then let it cool all the way down. Measure out 3-4 quarts of the water seasoned water (you can add some extra water if you're below the amount of quarts you're going for. The flavors will stay) and add the salt and sugar (1/4 cup of kosher salt and 2 tbs of sugar per quart of water. If you have regular salt instead of kosher salt, then you should only use 1/8 cup of salt per liter). Simply let the chicken sit in the water for a few hours (I think it's 8 hours for whole chickens. I haven't made a whole chicken in a really long time. I can look it up for you).
Remember to pat the chicken dry before you bake it (Because sugar browns so fast).
As for cooking it. You can't go wrong with garlic and butter. I typically use seasoned salt, terragon, thyme, lemon pepper, garlic salt, ground muster, and (believe it or not) ground ginger. Ground ginger sounds strange on poultry, but it's actually pretty good as long as you don't go overboard. When I make lemon chicken, I add brown sugar and chicken broth to it as well. I would just post my lemon chicken recipe, but that's best for just breasts, not the whole chicken (the way I make it involves deep frying before baking). Well, you'll probably need chicken broth either way. There's a billion ways to cook a chicken.
Edit3: The tricky thing about brining is that there will be salt inside your meat, so you can't oversalt the meat when seasoning it. I really don't know how to explain how to balance the seasonings that are inside the meat with those you add to the meat. It's something that comes from experience.
Edit4: Add oregano and sage. My bad, I use those too, but I didn't put it on the list above. The lemon pepper I use is more lemon and less pepper, so I typically add a little bit of extra pepper. It depends on your taste. Like I said, experience. You mentioned that you used to cook, so you probably know what you're doing.
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