I prefer to keep my licenses as simple as possible. I use creative commons for non-software distribution, and either the 2-clause BSD license or the MIT license. (I dislike GPL license because of it's lock-in properties, even though I sympathise with the ideas behind it.)
Since most software I write is written in a scripting language, it is possible to reduce the 2-clause BSD license to a 1-clause BSD license. To avoid any pitfalls, I simply took the first line of the BSD license and have it follow by the condition of the MIT license and combined warranty and disclaimer of liability of the MIT license. This is the shortest I can think of which is both free and indemnifies the authors from unreasonable claims.
BSD 1-clause / MIT style license
Copyright (c) <year> <copyright holders>
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following condition is met:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the software.
The software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND, express or implied, including but not limited to the warranties of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE and NONINFRINGEMENT. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.