Depending on which trigger you have, you can definitely improve the trigger pull. If you have the older 3 screw trigger, you can safely get it down to around 3lbs with a crisp break. Lots of info on here showing you how to do it.

As far as a stock goes, it depends on what you are looking to do with the rifle. If you are using as a hunting rifle, there really isn't any need to change the stock unless you are looking for something prettier. If you are going to be spending time at the range with the rifle, then I would definitely look into replacing the stock.

Boyds stocks are a good compromise between weight, stiffness, and price. I really like the prairie hunter. I put one on a Model 70 last year and it really helped improve the consistency. If you don't have the 3 screw trigger or the AccuTrigger, look into a Rifle Basix or SSS trigger.