Towelroot is a new easy way to root the s4. It only works on nc1 firmware. But with root comes a lot of responsibility. Root makes it much easier to bork your phone. There are somethings you should know.
First, the bootloader is still locked so don't use goo or rom manager to try to put twrp or cwm on your phone. Safestrap is still the only custom recovery you can use and touch wiz based roms are the only ones you can use.
Second, know where to find the full Odin flashable nb1 tar file. You'll probably need it if you bork your phone. See the general forum, for those of you who are search impaired http://forum.xda-developers.com/show...php?p=50912149
Third, and finally, just freeze bloatware, don't delete it. That way if you freeze something that your phone needs you can just unfreeze it.
Sorry for the rant but better safe than sorry.
Oh, and go here before you do anything else
Sent from my Nexus 5 using XDA Free mobile app