I've seen echos of this topic in other threads. Here are a few reference books I keep around for designing stuff
The ARRL handbook (Older versions seem to be more "hands on" and for this reason I have several editions, some dating back to the mid 30's)
The NAB Engineering handbook (lots of good stuff from a commercial perspective. Gives you something to aim for.)
Harry's Homebrew Lots of great DIY projects and tricks, methods, et al.
http://www.sm0vpo.com/+-RH