I think we can all agree that Mr. Garrett has rebounded quite handsomely from having his headset violently ripped off by Jerry Jones in the Diet Pepsi Max commercial. From the Dallas Morning News’ Todd Archer :

After going through second interviews with Baltimore and Atlanta, and having been offered the Ravens’ job earlier in the week, Jason Garrett has decided to continue his work as the Cowboys’ offensive coordinator. “We did negotiate with Jason Garrett to become our head coach. In the end, he decided to stay in Dallas,” the Ravens said in a statment.
It’s not known whether Jones sweetened the financial pot for Garrett to stay, but in 2004 Jones was able to keep then-defensive coordinator Mike Zimmer and then-assistant head coach Sean Payton from taking jobs at Nebraska and with the Oakland Raiders, respectively, by giving them $1 million base salaries.

One thing Jones could not do was guarantee Garrett he would succeed Wade Phillips.

Had Garrett taken either the Baltimore or the Atlanta job, he would have to go through a pain-staking process of finding a quarterback in hopes of rebuilding offenses that finished 22nd and 23rd, respectively, in 2007.