Neothin has done a good job of answering your question. IMHO tho, many Meguiars enthusiasts seem to prefer the liquid NXT wax over the paste in light of relatively easier application. I would suggest meguiarsonline.com for an excellent forum on car appearance care and more insight into the exact uses of their products. As Neothin said, the NXT booster wax truly would have little productive effect when used alone even if used weekly after every wash.
Personally, I would recommend the liquid NXT wax. Almost everyone agrees that to achieve the most uniform appearance and protection apply it thinly 2 times versus one thick coat. Be sure to wait at least 12 hours between coats for the polymers to setup. I would wait 24 hours to be sure tho. Also, it's important to note that because of the heavy amount of ESP (Engineered Synthetic Polymers) in the product, and the duration of time necessary for the ESPs to set, it's best to not buff the surface of the car all that much afterwards. Simply apply the wax, wait for it to dry, and wipe it off until the surface is clean. Do not continue to buff and buff and buff some more like one may do with a pure carnuba. I don't quite remember for sure, but I believe Mike Phillips, (who works for Meguiars and regularly posts on meguiarsonline and other popular car care forums such as autopia.org I believe), said he notices that people like to continually buff their car after using NXT wax, as if it was a pure carnuba. That over-buffing NXT, even for a minute or two, will just continue to spread the polymers all over the surface and either take too many of them up with the towel, or lead to a non-uniform layer of protection. So remember, just apply, wait till dry, wipe off, and then wait 12+ hours before using any other products on the car, including water. Rain will wreak havoc on NXT wax during the setup time and basically waste all of your hard work.
You probably know most of this information already, but I thought I would be thorough for good measure. Good luck to you and enjoy the process! =)