A word about the weight of the load. The four biggest factors regarding weight, include 1) tent, 2) sleeping bag, 3) cooking kit, 4) tools. Keeping these four in check can go a long way toward keeping an overall leaner touring kit.
     Tent: Consider a good quality one or two-person backpacking tent that weighs as close to 4 lbs. (or less) as possible. The packed weight of my REI Quarter Dome T1 tent is 2 lbs. 14 oz. (3 lbs. 5 oz. including footprint).
     Sleeping bag: Sleeping comfort is essential. Goes without saying. My preference is a down filled sleeping bag, but others prefer synthetic. Down is lighter and I think it's more comfortable, but it will not keep you warm if it becomes wet. Extra care is necessary to keep a down bag dry (such as a dry sack or just a plastic rubbish/trash bag). 2 lbs. is a good target weight for a sleeping bag.
     Cooking kit: Backpacking stoves are generally very light weignt. It's actually the fuel that adds most of the weight. I generally carry 22 oz. white gas/Coleman fuel, plus a small 11 oz. bottle of the same that I keep connected to the fuel pump and use on a daily basis. I prefer a white gas stove (such as the MSR WhisperLite Internationale for its cooking qualities, over an alcohol stove. Just my preference. Alcohol stoves are probably a tad lighter, however. I don't like to cook with aluminum cookware, so the choice is stainless steel or titanium. Titanium is more expensive, but the weight savings is appreciable. I use one 1.1 liter pot to cook in. That's it. I used to bring two pots, but have learned that one works just fine.
     Tools: I used to bring enough tools that I could fully field strip and rebuild the bike on the side of the road in the middle of the desert. I don't bring nearly as many tools now. Yes, anything can happen while touring, and we should pretty much be prepared for worst case scenarios. With that thought in mind, I now bring a few proprietary tools and spare nuts & bolts, a multi-tool, a brake and shifter cable, links of chain, fiber fix spokes, tire levers, tire pump, presta valve adapter, small amount of duct tape, some zip ties, and not too much more. Of course, bring chain lube, a patch kit, tire boot, and spare tubes. Most of these items are pretty light weight and with this abbreviated kit you can make all but the most major repairs and adjustments. (For travel in extremely remote areas or in third-world countries, I'd bring a more comprehensive tool kit.)
     The rest of your touring kit: 1) Electronics: You can bring as much or as little as you feel you need. You can actually get by with bring no electronic devices at all, but I think a better alternative is to at least bring a mobile/cell phone (with a smartphone being an even better choice). Other tech devices that are often contained in the touring cyclist's kit, includes GPS, laptop/netbook computer, tablet pc/iPad, music player, radio. They all add weight to the load, so bring if you must. 2) Clothes: Lightweight, fast drying cycling and street clothes offer the best functionality. I only bring one street outfit that can be worn hiking or at a restaurant in the evening. Hiking pants with zip-off legs are very versatile. Cycling clothes are worn for many hours every day and are meant to provide optimal comfort while pedalling away. I don't care to wash clothes every day, so I bring three sets of bike shorts and jerseys. Face it, these items aren't contributing very much to the overal weight of the load and they take up very little space. So, why not? I also bring four pair of socks, because I like to keep my feet happy. Anyway, that's just me. You might only want to bring two pair of bike shorts and socks. It's up to you. Like I said, they don't weigh all that much, so I go for comfort and convenience.
     There you have it, in a nutshell. A fairly comprehensive packing list follows below.