I watch the bargain cave online at cabelas and the clearance area online for bass pro. I also check out the home sites for gambler and others. I rarely pay full price for any tackle. I check every other day or so and take advantage when the opportunity comes. I also take advantage of the get 20 bucks off if you spend a hundred dollars at cabelas and bass pro if they have other stuff on sale that i want or need. I also keep an eye on walmart. Many times I find really great deals after the season. Last year I got 2 spools of berkely big game ( 12 lb) for a buck each.

I would have to say 50-75%. I'm just building up my tackle now though. Usually I look for the deals!

I like to shop ebay or walk around bass pro looking at the sale tags.  I'd say i pay full price around 50% of the time.  I do this when it's a product i really need.