CexpTretical writes "The accumulation and focusing of knowledge may be the noblest use or purpose of the internet. There are plenty of open or unsolved problems left for this generation. Why not spend some of your time in the dark of this winter working on one of the big problems facing humanity? Open problems exists in almost every field of study. Wikipedia maintains a small list of them and at least one international group called the Union of International Associations maintains a database of open problems." Which problem do you want to see cracked first? Are you already working on one of these big issues?