Stompalina hit 80 about a week ago now, nearly a month after a majority of my guild. The late start on raiding has required a bit of planning and preparation on my part to ready me for jumping right into raiding. Here are a few points that have helped me obtain my goals this week:
Gear Check
In my quest to research gear I came across a wonderful listing of pre-raid gear posted by our friends at Elitist Jerks. And, knowing what an organized freak I am, I reworked the listing into one that can be sorted by instance/boss/etc – here. The listing is a great resource for scoping out instances with gear upgrades, along with important quest rewards and gear obtained by collecting Emblems of Heroism – all of which are helpful in preparing for raiding.
Game Face
Another important piece of the raiding puzzle left to be reconfigured and prepared is my raiding UI (user interface). As with most add-ons, WOTLK totally put the shut down on compatibility for my pretty raiding UI. Since release I have been slowly resetting my raiding UI with new add-ons that are wrath-compatible, and keeping them current is now very easy-breezy with the Curse Client.
Setting up your UI for raiding is important, not just to look pretty, but to maximize your on-screen real estate. As a healer, it is easy to get bogged down in looking at bars going up and down. Unfortunately, that is only half the battle of being a good healer. The other half is being aware of your surroundings and being about to react quickly. To further maximize view perspective, there is a simple macro that adds additional camera area between you and your character. It is a must for any raider!
Skirmish Raiding
PVP raiding is an excellent way to get back into the swing of raid healing. Once you get used to the fact that you are destined to die (a lot), you can use the raid to set up your raid frames, as well as use and test your key bindings and clique combinations for both offensive and defensive spells. Additionally, PVP is an 
opportunity to work on personal-defensive reaction times (barkskin, war stomp, etc). Keeping yourself alive with quick reaction time is just as importing as shiny green numbers.
Secondary Skillz
As lame as most people think it is, cooking and fishing are a vital part of the game. And, to fully be prepared for raiding, most people are required to provide self-buffs including food. Unless you have a crutch buddy who is willing to cook for you every couple of days, it is almost absolutely necessary to level cooking to provide your buff food. The new cooking dailies are quick and nearly painless to get done on a frequent basis. The best part about the new cooking quests is that you are able to select the newly obtainable recipe that benefits you the most from the get-go by using your Dalaran Cooking Awards.
All in all, I have put about a week now into gearing up via craftables and drops, and I entered Heroic Naxxramas tonight with my guild. It was nearly painless, and I was able to contribute with much needed healing. From here, I still have a bit of catching up to do, but being prepared and dedicated lends itself to being able to post the numbers needed to be a successful raiding guild in Wrath.
