Last week I was challenged to take God My Rock by Brenton Brown from the key of D all the way down to G. That's a huge drop but it's doable and it might be easier than you think.
The beauty of the key of G is that the open chords always sound great on guitar. Since the song as it's recorded is capoed on the second fret and played with C shapes we'll use that for our transposition. Here's how it turns out:
This puts your intro progression at G D Em7 C2. Easy enough!
Lead is a little trickier but maybe not as bad as you might think. You can play the same thing, you just have to move everything down seven frets and for the most part this works. You just have to be wary that any note that is played on the 7th fret in the original tab becomes an open string. Here is an example of the opening intro riff:
The other place you might get tripped up is the verse. If you shift the riff that starts on the 9th fret of the E and G strings down to the second it works fine except you run out of frets as the riff continues. To remedy this you can start on the 7th fret of the D and B strings and use all the same shapes. Give it a try!
This one's up to you. Pick any song from our library and I'll transpose it to whatever key you want. The more experience you get with this the better. You'll be doing it on the fly in no time.