It's all about baby steps with the rebuid, piece by piece.
Agreed with Tavares, Don't! Anyone you trade for, you'll hope to get someone back who might be as good. Likely, that doesn't happen.
Like its mentioned, start by shipping out your older guys for young guns and solid picks. Once you've ridden yourself of the Jagr's of the world and have a solid base, start moving the other way and using the pieces you've aquired to start adding better pieces. I know it's vague and general advice, but that the general architect for a rebuild that I've always use and it generally has worked out pretty well. I'm in the middle of doing the same thing right now.
F: Huberdeau, Hall, Paciorietty, Spezza, Galchenyuk Grandlund, Baertschi, kassian, kreider, etem, Downie
D: Karlsson, Subban,doughty, Pronger, Pitkanen
G: Schneider, Hiller, Dubnyk /A-1 pt Win-2pts Shutouts- 5pts(2+3) PIM- .25pts
Top 13 count in scoring(4 d, 1 g, 7 fwd and next highest scoring skater or G)