Lock yourself in the bathroom and deny yourself water until you die of dehydration.
Hold your breath until you die of oxygen deprivation.
Smash your face into a tablesaw.
Better yet, get one of those big, two-person saws that lumberjacks use, put it upside down and then run your throat back and forth across it until your head falls off.
If I was going to kill myself I'd rip my own head off with my bare hands and then use it to kick a field goal before my body hit the ground.
Overdosing on drugs is for candy asses who'd rather be hospitalized than dead and get all kinds of bullshit sympathy from retards. Only a dipshit tries to OD because you just end up puking it all out. Drowning yourself in a bucket of said puke might be acceptable however.
Blowing your head off with a gun is a classic way out but by this point it's been done to death and become a cliche. It doesn't take much discipline either because it's over too quickly and therefore not very impressive. It would also be really messy. If I was one of those people whose job it was to clean up after dead bodies I'd be pissed off at some pussy who shot himself. Probably kick his stupid-looking corpse.
If I saw a dead body with pieces of silverware sticking out from the inside because he swallowed a whole tray of it I'd shake that corpse' cold, dead hand. Likewise if he flossed his teeth with barbed wire while standing on his head and then bled to death writing hilarious jokes and drawing stick people fucking each other in different positions with his own blood.
The last thing you ever do might as well be something I'd respect you for. Otherwise you're just another goof. Fuck you.
My coffee cup.