You could open the Special Characters Map* in your word processor, or memorize key combinations to produce the sign you want.
Or you could go to http://copypastecharacter.com/, select the character you need, copy it, and paste it into your document. (There's also an iPhone app for that http://copypastecharacter.com/iphone/)
|Screen shot copypastecharacter.com|
The character is copied to your clipboard immediately when touched, so you can easily launch the application, touch the character you want, exit and paste your clipboard into any application! ✌"
Drop a link to the site in your bookmark bar, to make it simple to find.
*To use Windows Character Map Tool (in Windows 7),
1. From the Start menu,
2. In the Open: textbox, type charmap
3. Click OK.
This little window will open -
If that's too easy, you could memorize all the keyboard codes. You can find them here.