Life insurance options - question

[Max T.]

1st question - What is the best "length of term" for a life insurance policy?

My understanding is that I can choose how long to set the contract, but the longer the term, the higher the premium. My premium would be on the low end if I did short term (1 year) versus long term (20 year), but the premiums can/will increase at each renewal period.

I am about to turn 30 years old in a few months.

2nd question - What is a good rule of thumb for the amount of the death benefit? I have heard 10-12 times my annual income.