Here are our step-by-step tutorials that will guide you through all the process of jailbreaking iOS 5 with redsn0w 0.9.9 and sn0wbreeze 2.8:

iphone-4 iPhone 4

Semi-Tethered jailbreak iOS 5:

iphone3gs_s iPhone 3GS

Semi–Tethered and UnTethered jailbreak iOS 5:

ipad3g iPad 1

Semi–Tethered jailbreak iOS 5:

ipod-touch-3g_s iPod Touch 3G

Semi–Tethered jailbreak iOS 5:

ipod-touch-4g_s iPod Touch 4G

Semi–Tethered jailbreak iOS 4.3.5:

Other tutorials are available here.

You can convert tethered jailbreak to a semi-tethered jailbreak using our tutorial from here.