in chrome when I hit one key + tab + enter
t > twitter.com
y > youtube.com
p > pivotaltracker.com
a > analytics.google.com
s > stasishq.com (my company)
d > designcodelearn.com (my blog)
f > facebook.com
g > github.com
h > heroku.com
l > linkedin.com
x > xkcd.com
c > calendar.google.com
n > news.ycombinator.com
m > mail.google.com