What are you asking Santa for this year? Santa told me he's FLAT BROKE, but maybe something modest might come my way.
These are some relatively inexpensive items that I have and enjoy, and perhaps you, or your favorite road-going bicyclist might enjoy. Enjoy!
I've got a couple suggestions.
The CycleAware Reflex mirror sticks onto a helmet. (An eyeglass-mount model is also available.) It's relatively sturdy - an important consideration. I've tried mirrors with hard plastic components, and have snapped off the mirror, rendering them useless. The Reflex is built of "Gumby" stuff - a wire enclosed in rubbery plastic.
The "Take a Look" mirror is my current model. It can mount either on eyeglasses, or on a helmet visor. It is constructed of metal - stainless steel and brass - and should be durable. The mirror itself is excellent - better than the Reflex. Mine is on my helmet, and I've got to figure out some way to make the attachment more permanent. If I bump it, it falls off. So far I've been lucky and have quickly noticed. (I'm thinking I might drill a small hole in the helmet visor, so I can zip-tie it in place.)
Both should be available online, or at your LBS (local bike shop). Expect to pay $15 or so.
I've been VERY pleased with my Planet Bike SuperFlash. It's more expensive ($25) than other models, but is extraordinarily noticeable... and ain't that what it's all about? Runs in blinky mode or on-constantly mode. Uses 2 AAA batteries, included.
I blogged recently about my Akoray flashlight, from DealExtreme. It is awesome. I'm on the 2nd AA battery now. I might start using rechargeable batteries, but when a 30-cent battery lasts for 2 weeks, you can't complain. (Bob T uses rechargeables, but he rides with his light on, both night and day.) Mine cost about $14, including shipping.
Be sure to get some kind of mounting device - several are available at DealExtreme.
NOTE: Order now for Christmas - and HURRY! (DealExtreme ships from Hong Kong, so it takes a couple weeks to arrive.)
I've got a balaclava and gloves, to keep my extremeties (fingers and ears) from falling off on those really brisk days. You don't need expensive bike-specific stuff, but find something that isn't so thick that you can't squeeze your helmet on over it. Mine is "open face" - the "Jackson's Convenience Store robbery" model tends to trap condensation and cause fogging on glasses. My gloves aren't too thick, either, and have a rubbery palm for good gripping.
I also have some yellow-lens glasses for riding when lighting conditions are marginal. Light yellow or clear works fine. (You want to protect those eyes - replacements are hard to come by!) I tried a set that has interchangeable lenses - dark, yellow, and clear. But for me, it's more hassle than it's worth to change the lenses, clean the fingerprints off, store the lenses, etc., when you can buy separate glasses for $6 or $8.
I have a permanently-attached seat bag, to carry a spare tube, patch kit, light batteries, chap stick, and a couple small tools. I got the Avenir Bigmouth in size medium, for the new ride. It's quite nice. May not be totally waterproof, but looks very water-resistant. Opens without removing. And it has a zip-open expander, so you can stuff your cellphone and a couple granola bars in. (I ordered it online. $12 and change.)
I carry my sack lunch, checkbook, pocket planner, a couple pens, glasses, and a big ol' freakin' knife (just in case!) in a fanny pack. Some folks use a messenger bag, but I prefer to economize on what I need to carry.
My choice is the Kelty Cardinal, for
a very specific reason... it can expand into a little daypack! So if I end up needing additional carrying capacity along the way, I'm not stuck. It has a little MP3-player-size zipper pocket, and stretchy nets for 2 water bottles. (I use the bottle holders for my digital camera, sunglasses, gloves, etc. The pack comes with 2 bottles, however.) If you shop around, you can find it for around $40.
(I plan on writing more extensive reviews of some of this stuff... just wanted to slap together a Santa list while it still matters...)