What's worse: arriving at work with a soaking wet bag or having to leave your lunch at home because you can't cram it into your backpack? The answer, of course, is "both of them are awful" and the best way to alleviate the above problems is to invest in a good quality cycling backpack.
By "good quality" we mean a few things: large enough to fit all of the essentials inside (see, lunch above), waterproof enough to keep your laptop happy and vibrant enough to pre-warn any tired drivers who may not be paying quite as much attention as they should be.
