Easy Way Create Bootable USB Drives

Rufus is a small utility that helps format and create bootable USB flash drives, such as USB keys/pendrives, memory sticks, etc. It can be especially useful for cases where: 

you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.)

you need to work on a system that doesn't have an OS installed

you need to flash a BIOS or other firmware from DOS

you want to run a low-level utility

Despite its small size, Rufus provides everything you need!
Oh, and Rufus is fast. For instance it's about twice as fast as UNetbootin, Universal USB Installer or Windows 7 USB download tool, on the creation of a Windows 7 USB installation drive from an ISO (with honorable mention to WiNToBootic for managing to keep up). It is also marginally faster on the creation of Linux bootable USB from ISO.

A non exhaustive list of Rufus supported ISOs is also provided at the bottom of this page