Bunnahabhain: Anyone registered to vote, who is over 30, and has achieved a reasonable level of education , should be entered into a lottery. If your name comes up, you serve a term in the House of Lords. In a stoke, the house should be balanced geographically, racially, and by gender.
The only exclusions should be for criminal offenses, minor ones for a few years, serious ones for life.

Dazbo: I'm in favour of a system similar to jury service: one registered adult is chosen at random from each constituency (criminals and party members excepted) to serve a fixed term.

Interesting idea, making serving as a "Lord" like jury service. There are some obstacles to this: just as with jury service, not everybody would want to do it, and I assume we will be talking about a longer term than just a few weeks. This could have an adverse effect on an individual, depending on their circumstances, with regard to their career, etc., especially if the financial aspects are not taken care of properly. Having people chosen against their will is not a good idea. Maybe anyone who wants to opt out should be allowed to do so, unlike jury service - or do we think that would mean th wrong people would always get in?