http://oi45tmbel5syg4uet4t2fg6ipfu22ewfb4dfgpeckarn3qtv3pwq.b32.i2p/tips.html
Less strongly, you could split your activities into batches, taking into account the other profiling methods, so that at least they can't all be linked together: download books in the morning, upload music in the afternoon, and edit text files in the evening.