Only day 3 and i feel pretty close to giving in.

So I quit because I really need to focus on school, getting a summer job lined up and overcoming my anxiety and not depending on trees. But its just so hard to be productive at night, especially on Friday and Saturday nights, I just want to drink and smoke and not give a fuck. Like the title says only day 3, but I'm really craving that "one last time" before I really have to get my shit done.

Any advice?