Here's a few suggestions:
Plan on taking your time. Most kits that are assembled in a hurry end up with something mis-wired or with a bad solder joint somewhere, that might keep the amp from working the first time, or might create a failure a week or a month down the road. One can build this kit in an evening with some dedication and a good espresso, but a more reasonable (and enjoyable) time frame is to consider the build something to be done over a couple of evenings or on a weekend. A lot of folks end up with a sort of "post-build'em depression" once the kit is done, and typically the second thing they build is done at a more leisurely pace in order the savor the actual process of creation.
Good tools always make the job more pleasant. A good solder station costs more than a cheapo Radio Shack soldering iron, but it will work better. Based on my experiences soldering equipment together over the past 16 years I would say something on the order of 1000 times better. A good Weller or Hakko can cost under $100 and is worth its weight in gold when you get to those particularly tricky soldering bits. The most popular solution, for good reason, is to buy a Hakko 936. You will probably not need another iron for the rest of your life. Used solder stations are usually a reasonable purchase if you can make sure they work and the tip is in good shape. If you get a Radio Shack iron the tip will be ready for the garbage can when you are done with your first kit - if it makes it all the way to the end.
A magnifier will save you lots of headaches. Use it to examine every solder joint. Don't let some sort of goofy notion that only old farts need a magnifier keep you from using one. I've shown more than one under 40 yo guy a solder joint that wasn't right through my flip down magnifiers (chicks really dig me when I wear them) that he didn't catch with his naked eye. Same goes for a good work light. Makes the experience much more pleasant.
Good wire cutters like Weller (Cooper Tool) side cutters are a joy to use, and I like the "automatic" style wire strippers that have little jaws that come together and jaws that pull the wire out from the insulation as you squeeze the handles. Once again, it is hard to be certain that the Radio Shack equivalents will even make it all the way through the build without breaking.