I use a <a href="
https://www.newenough.com/parts/luggage/tank_bags/rapid_transit/recon_19_magnetic_motorcycle_tank_bag.html" target="_blank">Rapid Transit Recon 19</a> tank bag. Big enough, but not too big, with lots of interior and exterior pockets. The magnetic mounting is very secure, even in those heavy crosswinds we all love so much.
I am so glad that I checked out this bag. I had to buy it off of Ebay and didn't get to see it in person, but what a bag. I highly recommend this bag. I'm a new rider and I am as anal retentive as they come. This bag has the pockets, a cover built into it, a place for your phone (I'm on call alot). For me it was perfect, thanks for the great advice!!!
Here's my basic style bike with the bag on it. For my needs it was perfect. There's some great suggestions on here, that's for sure.
:thumbsupsmiley: I like the Rapid Transit 19 too. Its perfect for my FJR, but a little too long for my FZ1 tank. I like the built in cover (so I can't lose it) and the pockets are nice, lots of room, and pretty sleek so I barely know its there.