Bought myself some new gear inner cables due to shifting problems with the old cables fitted to my Carrera. Took the new inner cables out of their bag and hung them coiled over the brake leaver, proceeded to snip the old cables, removed them, cleaned the outers and was ready to insert the new inners. Somehow I managed to pick up a spare brake inner cable instead, cussed at myself (many times) for buying the wrong cables, then used ultra slow public transport to crawl back to the cycle shop and buy more inner gear cables.
Returned home, took the new inner cables out of their bags and hung them on the brake leaver where I found the original two I'd already bought!! ... I called myself so many names my ears were burning