I've been carrying the same one, a Kingston Data Traveler in a tiny ziploc in my pocket for years.
Write the Windows 7 ISO to stick using UltraISO trial version: on File tab open ISO, on Bootable tab Write Image, then Format, Write.
The installer files will be in the root but you can keep them in a folder when not installing so they don't accidentally get deleted.
To that I add XP, Vista, various Office installers, Works, Adobe, Flash, Java, CCleaner, Auslogics Defraggers, PowerISO, Acronis boot disk, PW, memtest86, GWScan, etc.
Instant tool kit for the pocket.