Ask blitzkrieg80 for more, he's an expert. I know some stuff about linguistics...blitz did EB "Germanic Indo-European" (as he calls it) based on Proto-Indo-European words fed through the first two phases of the germanic sound shift (according to Grimm's law). "PG" is what I will use to represent Proto-Germanic; *EB will represent EB Germanic Indo-European.

The first phase of the sound shift is voiceless stops becoming voiceless fricatives. After an "s," this doesn't apply. However, "sk" becomes "sh" later in some Germanic languages (example Old English scitte, "dung" becomes English shit)

p > f; English fish, PG *fiskaz, EB *fiskoz; PIE *pisk
t > þ; English three, PG *þriz, EB *þreiz; PIE *treies
k > **x; English heart, PG *xartan, EB *xardom; PIE *kardom
kw > hw; English what, PG *xwat, EB *xwod; PIE *kwod

The second phase is voiced aspirated stops becoming voiced [unaspirated] stops.

gh > g; English goat, PG *gaitaz, EB *gaidoz; PIE *ghaidos
bg > b; English brother, PG *brōþar, EB *brōþer; PIE *bhrehtēr
dh > d; English daughter, PG *duxtēr, EB *duhtēr; PIE *dhuktēr

The third phase is voiced stops (that were unaspirated in proto-indo-european, or PIE) become voiceless stops. This phase has not occured yet in EB.

d > t; English ten, PG *texn, EB *dexm; PIE *dekm
g > k; English cold, PG *kald-, EB *gold-; PIE *geld-
b > p (few examples beginning with "p")

*indicates reconstructed word

** "x" represents the sound represented by the greek letter Chi, the "h" in "heart" or the "ch" in German words. It is based off of the IPA symbol x, which represents the same sound.