|A few hundred ways to be sure.|
Start with a web search engine and use the phrase, "create bootable cd".
The first page ought to get you going.
The bootable usb device doesn't work on all machines and all flash drives, but many people use them.
Start at pendrivelinux.com
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10