If you're dumb enough to try suicide with a knife than you deserve to die!!
Dude, do a google search. I'm a cyanide man myself, but there are those out there who prefer arsenic. There are some die-hard gun people, but they're a minority and no-one takes them seriously. There are some great flame wars on the subject and you should check them out.
Do you think I have a carrier in psychiatry? Maybe not. What you really need to do is go search your in self or some other crap, and though it may not help you much, you will walk away thinking you’ve conquered some great life obstacle and you will be ultra motivated, until you realize that it was all utter nonsense, but by that time you’re life will be better, and you will think your self a moron for have even considering such a stupid notion as suicide.
Now this feeble attempt at humor may have made you laugh briefly at my ineptitude at wit, but you’re probably still depressed. Don’t worry. You’ll get over it. We all have these periods. You’re life will be better after a couple of months anyway. Oh, and any particular reason why you’re depressed?