I like to binge snacks (doesn't matter if healthy or not) out from my house, so it sometimes feels hard to stay in specific calorie amount. What helps me with that is to either make snacking a process where I need to prepare it each time I want them or not to buy any from stores.
Also just generally preparing food yourself instead of just ordering/buying food helps with getting less calories. Not always possible due to time/energy/money, but it has helped me a lot.
Good luck with your plans!