Given I've been here for about a year now, here's some new bits I've picked up to add on to extra.
Take your time - While some RPers like James Baker (Pimpin) can produce top notch RPs within a day of the boards going up, I've found that 98% of immediately rushed and posted RPs tend to be poor quality. Remember, unless you've got a hectic schedule, you have about 7-10 days each round to come up with an RP, why the rush? While it's been noted not to leave RPs last minute and some people make it their tactic to do so for benefits, they don't always work.
I'm going to reveal a secret about how I do my RPs. I tend to write them after I've found my line of thought, but then leave it a few days and come back to it to find the flaws in order to get the right feel out of. That method works for me because I can get a better perspective out of my RP and not be caught up in the moment. Rushing does not benefit an RP, much like with anything, you have plenty of time to write one, just use it to your full advantage.
Do your research - This one I'm repeating from before because it's so important. If you look at some of the match RPs at Kingdom Come (Tag Titles, EurAsian, Blade/Rush, Real and World Title are the main ones I'm thinking of), look at how much research was done and used to benefit. I'm going to take me and Show and demonstrate the example of using it to our advantages.
Timeline
[*]Show and Big Dave win a contract battle royale at Meltdown 20 (with TM and Ace David)
[*]They wrestle a tag team match (Showtime/TM vs. Big Dave/Ace David - soon to called FHD) at Meltdown 21
[*]FHD wins the tag titles in their PPV debut at Unscripted by Ace pinning Showtime
[*]FHD go on to longest tag title reign
[*]Show wins the Mayhem and EurAsian titles
[*]Week before Kingdom Come, Show injures Ace David
A lot more has happened but these are key elements to note as to mine and Showtime's match, that's the history that is relevant to us, our Kingdom Come match was the first time we've had a solo face off and was almost a year in waiting to happen and we both brought our A games because we had the history to back up our RPs and add extra depth.
The same goes for most matches, the best RPers are ones who research everything they can or remember certain moments like, did I clash with him in a tag match or the Lethal Lottery? The more personal or more linked you can put yourself with your opponent, the better you can come off, naturally newcomers will find this hard at first because they won't have much to work on, but some people can really make their mark from the go, see Austin Reynolds and Chris Beckford for recent examples.
Also, research on WZCW itself, know the interviewers and staff, the shows and PPVs. Just to give a hint, there's 4 interviewers (2 male, 2 female), Two Co-Owners, one that runs Meltdown and one that runs Ascension. There are more, but if you find the NPC roster, then you're halfway home. And WZCW On Demand will give you every show that's existed.
That's two main tips I'll give to newcomers, I hope they help.