Before you rope you should do several things first. First is, any person you care about make it painfully clear you gonna suicide soon. If they can't change your mind or don't care about you it will lift any burden. Another thing, quit everything you have to do (Work, school, whatever) and neetmax. Watch all movies/games and whatever you ever wanted for a set period of time, getting all fun imagineable. Maybe neetmax life is enjoyable enough. Take up loans/debt and try to hit it big with gambling (Or stocks), maybe you hit the 1% luck and 100 fold it, being able to live life of luxury. If everything fails, you could do some different fun stuff which is normally not possible.
Lastly if the set date comes, have something proper prepared to end your life. Asphyxiation/falling are some of the worst options.
Also technically you don't have to wait, you could just go outside and die due to the cold anytime. But I rather have you not off yourself.