What are some good trigger modifications/products to lighten the trigger pull?

I have found a couple online, but I have no idea what I am looking for, what types are best, etc. All I know is the kind that you have to file can be expensive if you file a hair too much....

I want a system that I can always reverse back to factory condition.

Thanks.

Jewell trigger.

Search for Georgia Precision and email him.  Best price around.

www.jpar15.com/fire.htm
www.midwayusa.com/online/productpage.exe/showproduct?SaleItemID=709049

Are those kits easy to install for someone who has never taken his trigger assembly apart?

It couldn't be that hard could it???

There are really two solutions:

(1) simply replace the factory spring with a lighter one.  JP makes a reduced power spring set ($10) that will reduce trigger pull to between 4½-5 lbs.  

(2) Replace your factory (heavy pull by design) trigger with a quality aftermarket trigger that is either set or can be adjusted to a lighter pull.  There a many mfrs. (RRA, DPMS, Jewell, JP, Accuracy Speaks) that make quality triggers that break with less pressure.  There are either single stage and two-stage triggers, with some being adjustable and others not.  Exactly which type you need depends on the application.

After hearing the advice of several others (mostly Troy) I chose to replace my trigger (DPMS Sweet 16 varmint setup) with the Accuracy Speaks (~$150) single stage (3-4 lbs).  I haven't installed it yet, but will post my experiences and results as soon as I have time to install it and do some shooting.

I've got the Accuracy Speaks single stage and I think it's great.  If I wasn't spending so much on other things I'd put one in each of my ARs.  

Quoted: Are those kits easy to install for someone who has never taken his trigger assembly apart? It couldn't be that hard could it???

It's not that hard.  Drive 2 pins out, remove existing trigger, hammer and springs and then replace with what ever you bought.

I tip is to get an extra set of pins, chuck them in a drill and sand them down about 1/100" or so and set up the trigger on these pins and then drive your real pins in displacing these undersized ones.

The reason I like the Jewell is it easy to adjust just by popping the rear pin and moving the spring tail to a different notch.  Tis comes in handy if you shoot matches where they weigh your trigger.  Also you can set it real light for bench shooting and then heavy it up if you're going for a walk in the woods, no tools required.