Moving on from the "changing careers" thread what's the best way to actually find a job in London these days?*

*Answer with specific reference to people who aren't really sure what kind of job they are looking for. Possibly people with a degree and MA in useless media subjects and 3 years of admin/secretarial experience who will consider absolutely anything that has a similar level of pay (roughly 20 grand a year) and isn't an admin/secretarial job.