Well I do not know how everyone else does it.....
Let's say I want to leave a link to SpookyTooth Cycles
I go to the Spooky T site and High lite there http: address (Left Click)
Then I right click, and then click on "copy"
Then I come back to the forum and on my post right click again and then left click "paste"
Spooky Tooth Cycles - Motorized Bicycles: Gas Powered and Electric Bikes - Home
I also open a second browser or window so I can switch from the forum to whatever else I maybe doing.
I hope I explained it so you understand, maybe someone else can explain it better.