Low buy/no buy while moving

I'm moving to another city soon and I'm wondering if anyone has some tips for not overspending, while also needing to replace things?

I'm on a tight budget because of the move, but I'm trying not to feel guilty about needing new things. At the same time, I'm worried I will go overboard, especially since the new apartment is half the size of the old one. It's just so easy to fill your house with crap you don't need!