i have never built a savage, but i have built an HPI kit (baja SS) very well documented, packaged, and organized.
first step, find a big table. if you think you have enough room, double it.
second as duck said, RTFM. read over it once or twice before you start so you know what to expect.
locktite!!! all screws that go into metal.
dont get in a hurry, read each step twice, lay out the parts in order, then start that step. dont skip around either. they bag each step in its own bag so you finish it before opening another one.
organization!! lots of little parts. have something to hold them, until you need them
the baja took me about 22 hours. the savage shouldnt take near that long. I've tore down a rebuilt a few, just never from scratch.