All my bikes have 1-2 blinkies.

In terms of rear blinkies, I liked the Vistalite 5-LED taillight very much, but it's a bit weak compared to newer technology. The new BLT Rear Flare DX is as brilliant on-axis and has a wider beam than the popular Cateye TL-LD-1000, but due to a different design, it can be bloted through onto a rack, whereas the Cateye cannot be bolted through (I don't trust a blind screw to resist our potholes).

In the front, I have a generator hub with a headlight on each bike.

I also have a "standard kit" in my pannier, with a Road Morph pump, a 700c and a 20" tube (the latter for my daughter), patches, an extra blinkie and a small LED headlight.

Oh, one of my bikes has one Shraeder rim and all others are Presta. My easy solution is to carry a couple of doughnuts so I can safely use a Presta tube in my Shraeder rim. These doughnuts are vailable at $0,10 at your favourite LBS, but you have to order them...

For highway cycling, the BLT Rear Super Doppler DX is the most powerful on-axis taillight I have found yet. From what I have seen, the same design is also available under two or three other names.

I'm with genec

Niterider uses the same mount that it has always used. I have several light heads (I get them at swap meets and on sale at bike shops) but the mounting bracket has always been the same. Most of the shops where I live carry Niterider and have lots of extra mounts. The mounts can be sort of expensive for the universal ones (around $30) but they also make, and you can find them if you look, a cheaper version. But I don't think that Niterider is unique in offering spare mounting brackets. Light and Motion, Nite Hawk and others also offer spare mounting brackets.

If you are using a less expensive light like the Cateye EL series, I don't know if you can get spare brackets but you might try contacting the manufacturer of your system to see what they offer. Most of the ones that I've seen will sell the bracket direct to you rather than make you go to a shop, if you like.

Because my wife has the rather quaint idea that she shouldn't have to scrape ice off her car in the morning If she'd just clear her car out of my garage I could get another 20 or even 30 bikes in there, easily Selfish woman!

Cateye.com or your Cateye dealer, typically about $3 each.

I'd never sell a bike! There's always more room for one more bike.

My situation as well... except I now have 3 bikes. I've got the short distance commuter fixie. I've got the long distance commuter (road bike geared down a bit and with racks, panniers and permanent fenders). I've got the stripped down road bike. Road bike and long distance commuter share the saddle bag with tools and flat fixings, and the pump. Fixie has it's own tool bag since I need to tote around a box end wrench to get the wheel off. Fixie and commuter share a niterider light, but each has its own blinkies (or used to before one fell off and was run over; got to get that replaced.

The problem with cycling is I always want another bike. I got the fixie not even a year ago and I'm already forming long term plans for another bike. Have to decide where I want to take this cycling thing. It will either be a better quality road bike (it's always nice to have a rain bike) - which will suit my ideas of getting into centuries or racing; or it will be a touring bike so I can take a week to ride around and not have to answer to anyone but myself... decisions, decision... but I digress.

Rule of thumb I have is that expensive and universal stuff (headlight, multitool, spare tubes, frame pump etc.) I share between bikes. Unique or inexpensive things I buy redundent. Beyond that, I buy redundent if there is a chance I will stash the bike at work permanently; for instance my fixie, during the summer, will probably be stashed at work since most of my commuting will be with my long distance commuter. Because of this, the fixie gets it's own repair kit.