Books. No books! Paper is extremely heavy with respect to its usefulness. Read your tourist guide before the trip and leave it at home. The only thing that I need from a guidebook on the trip are maps of towns. I photocopy these or tear them off the guide – there is no place for sentimentality here. On a long trip it is sometimes nice to have something to read. When this mood hits me, I stay a day or two in some hostel where they have books to lend.
P.S. I wrote this paragraph few years ago and now it is obsolete: nobody uses film cameras any more. However, you can read it as “compact versus DSLR” musing. With regard to weight and bulk DSLRs are a huge step backward from compact cameras. And to those of you why prefer the DSLRs because of their superior picture quality, I say: tell me that when you make your first poster print or publish an article in National Geographics.
Locks. My philosophy for securing the bike is to have it always in sight. On few occasions when it is not possible, I lock it with the small cable lock to a solid object – and hope for the best. I assume that any kind of lock can be broken, so you might as well have the smallest and lightest lock, just to prevent any passer-by taking your bike. As you can see on the picture I use now a small cable with combination lock (48 g). The cable is just thick enought that you can’t break it with your teeth – unless you are a character from James Bond movies. This means that you’ll need a tool to break the lock. But if you are determined to steal the bike to the point that you brought the tool, then you’ll break any kind of lock.
Cycling jersey. Make a good use of cycling jersey’s pockets. They are ideal carriers: light, aerodinamic, accessible on the fly. You can store 200 to 300 grams there – possibly everything you need while riding on an average day. Some additional stuff can be tucked under the leggings of cycling shorts.
Bicycle frame. Lot of stuff can be taped on various parts of the frame. I usualy tape less frequently used items to the frame: spare tubes, spare tyre, spare