how do you figure? you say you dont want to pay HUNDREDS of dollars if you break your phone? you'll be paying just that for an insurance/warranty plan. just put the money aside and you'll cover yourself. it's a no brainer. you'll make more money on interest on a bank statement and wont lose out.
other things you can do:
buy a case
TAKE CARE OF YOUR PHONE
dont do anything stupid that may void your basic support from google/htc (ROOTING)
if you just follow these steps, at the end of a couple years youll have more than enough money to buy yourself a nice shiny new phone, and sell the N1 as a used one to subsidize your purchase
that's what i do with all my phones!