How do you store and organize your leftover keys?

In notepads ofcourse :D

excel

.txt

Save them up for a big Christmas giveaway event, then wait... and wait... and wait... :)

I got all my paypal payments, receipt, redeem confirmation and such organized in appropriate folders under my main documents one (GOG, Steam, various bundle sites and so on)
Unused keys are in a simple text document inside those

I just give them away as soon as I get them.

Leftover keys? What's that? TT_TT

Humble.txt on Desktop , over 300 keys stored here.

xml document with a python ui

Excel

notepad

I've got a simple .txt file that's open pretty much constantly in which I make all kinds of random notes and such. Spare indie keys are in a list near the bottom of it. I imagine it would be pretty funny to watch someone else try to make sense of it all. :p

Notepad master race, reporting for duty.

OpenOffice spreadsheet.

.txt files work fine for me

spreadsheet on the Google Drive, it has some advantages over simple txt. you can sort them by name and other nifty stuff.

I have a Google Doc sheet where I write all my games, where I bought them, and the Bundles. If I don't use all bundle keys, I put the key (or now just game name and bundle name, since it auto redeems on Steam) in another tab.

Excel spreadsheet.

Better yet, I have formulas for the following:

• autogenerate text for the giveaway itself (generally unused)
• autogenerate email text that can be copy/pasted into a google script to email a key to someone
• autogenerate markdown, html, and bbcode for announcing the giveaway in various places
• autogenerate html signature with link to giveaway for posting on denizen (generally unused, because I CBF logging into tumblr)

Currently I have 147 unused gift urls for humble bundle, indiegala, groupees, and indieroyale; and 368 codes for steam, desura, GOG, and topware. Yay for shitty giveaways.

In an encrypted document stored on my computer.

To those who use Google Docs/Drive: If your account is ever becomes compromised someone could steal all of your keys. If I were you I would enable 2-step verification using a mobile phone, which works sort of like Steam Guard.

Brightly coloured Post-It notes, scattered around my office.

Windows' notepad.

Microsoft word

I just keep them unrevealed in humble library so I know which ones are used and which aren't.

EVERNOTE.

Put them all on a note(or multiple ones in a notebook), easy for searching- i personally divide them up a bit(on different notes).

If youre worried about security you can create a local note or encrypt your notes.

I hate charts; Plus there i paste link to steam store and some screenshots for those im still considering if i will redeem or not; I leave them there waiting some time because HUGE BACKLOG already.

PS: why you guys aren't using evernote already? Its a time saver note-files-dump i recomend to everyone.