Your Windows password is your first line of defence against someone getting deeper into your system. It's not uncrackable, but you can make it tougher by adding a space — which, oddly enough, Windows is cool with.
That tip comes from Lifehacker reader Java-Princess, who notes that Windows passwords not only allow ASCII characters that require key combos, but also spaces. Many password guessers might never guess at a space bar, because so few password systems allow them. And with spaces randomly inserted into a password, you could, as Java-Princess suggests, even write down your password, just omitting the spaces.
Security firm Symantec, in a post about Windows password myths, also supports the use of spaces, especially in the middle of a password to separate two uncommon words. Symantec does note that those close enough to listen to you type in your password might hear the distinct thwack of a keyboard, so you'd want to be discrete when you're feeling wary.
There could also be drawbacks to using spaces as your Windows password if you're trying to connect remotely to your system — we haven't tested it out yet, but feel free to let us know, sysadmin types. Otherwise, consider giving your Windows password some space.