too easy.
suffocation - simple plastic bag will do, every household has one
cutting - knifes, scissors, etc..
biting off own tongue - loss of blood
hanging - cable/computer/appliance wires
jumping - lots of people live in atleast 2 story buildings, just jump headfirst.
ramming head into wall - ancient chinese suicide tactic, only works if you do it really hard, otherwise you'll just go unconcious, lol