One tip to remember is that speaking Spanish will help you greatly. You'll be treated differently than if you speak English all the time, it'll help you assimilate to Peru, and it'll get you cheaper prices. If you're looking to learn Spanish, check out Fluenz Spanish, Rosetta Stone, and Synergy Spanish.
The bubble's going to burst though. Maybe not right away, but give it a couple years and it will. My advice: pay off your mortgage. Save the rent you're getting from your tenants if you're renting your place out. Things will get tough in a couple years and this is partly due to the fact that more and more places are being listed in dollars rather than soles.
The Ultimate Peru List recommends: