You can put your call sign in you signature for easy look up.
Here is an easy way.
Open your user CP.
Click the edit signature box.
Copy this code and paste in the box.
Change to call sign to your call sign in both places.
Replace the ( with [ and ) with ]
Save.
Your call will now appear in your signature. If some one clicks it it will go to QRZ look up data base.
This is what mine looks like:
(url=http://www.qrz.com/callsign/KC4UMO)KC4UMO(/url)