Keep it Handy!
I was over at the spa earlier in the week, and they have these personalized organizers and promo pens they are giving their clients. I love that I can toss it in my purse and have their number handy. Of course, I know the number well, since I fill-in and work there sometimes! Sometimes what I like to do is leave my business card with a discount with a tip at a restaurant. I can leave the pen with a tip as well now! What a great way to quietly advertise, but pass the number on to someone else!
