Ever have clients come by your office who need to read documents?  Get a load of this tip (for waiters and waitresses) from Tricks of the Trade:

Keep a pair of reading glasses at hand. At least once every few days you'll get a customer who forgot their glasses and are unable to read the menu. Produce your spare pair and a good tip is secure.

Reading glasses are cheap at Wal-Mart, Target, etc.  Grab a few pairs and your clients will “see” what a great lawyer you are.  I know, bad pun.