I used to use YouTrack to track all issues. Some times I need to open an issue in YouTrack by number. This usually happens if team-mate says me a number or if I see only a issue id without a link. My solution is to crate a small .bat file placed in the system path.

Source of my TW.bat:

explorer
      http://www.jetbrains.net/tracker/issue/TW-%1

Now to open an issue I do the following:
- press WIN + R
- type tw <space> <issue number>
- press ENTER

For me this work as fast as possible.