What both anons said.
It being illegal isn't really a problem in my eyes. I think the people who want to kill themselves really should do it themselves because doing it is difficult and the moment you try to overcome your instinct is where it shows whether you really want it or not.
If there was a suicide booth or something, a lot of people (including me) would probably be dead already, which isn't really a bad thing in itself but I'm pretty sure that the majority of them don't think it's that horrible that they are still alive, else they would have ended it themselves already.
Suicide is in my opinion also something you really need to do alone, I don't like group suicide because I'm convinced that most people there are afraid of doing it alone, probably still having doubts (two people really close to each others killing themselves sounds only good, if both of them would've killed themselves alone too, so don't really need each other and have no regrets).
Suicide should be well thought-out (you have the time to think about it anyways, it's not like you're going to die tomorrow and if you are, you really don't need go through the hassle of killing yourself) and done calmly, not be fueled by an emotional reaction because those go away after a time and probably leave you with a completely different stance on suicide.
Euthanasia is a little bit different because they aren't able to kill themselves, I support that as long as it is provable that it's the wish of the patient.
I despise suicide prevention like calling those people sick, denying that they can think rationally and locking them up and all that shit. It really goes against the ideals of society, if you think about it. Like nobody has the right to kill another, nobody should have the right to force another to live. People should be free to end their lives.
I apologize for my rant and hope this doesn't count as encouragement.