Discipline at what age?

You're already doing what's appropriate at this age. Say no and redirect, she's paying with the cart say no and hand her something elce she can play with

there’s no reason to change from what you’re doing to just a ‘no’ and letting her ‘cry it out’. you’re doing the right thing, for almost every age of child! setting the boundaries and expectations and then redirecting them. there’s no reason to just say no and ‘discipline’ a child by leaving them to cry when you can do what you’re doing and prevent it from happening. if she does something ‘wrong’ then you let her know calmly and tell her what she can do instead. for example biting, if she bites you you just say no thank you we don’t bite mummy and hand her a teether. you’re teaching her the right thing to do, and giving her an opportunity to learn as opposed to just being told off and learning nothing xx

she is an 8mo baby, everything she is doing is developmental…babies are not manipulative beings, no matter how smart they may seem.
hug her, cuddles, kisses and love on her, teach her no and all the cutesy stuff! she won’t be this little forever! adapt your environment for her, ensure there’s less things for her to get into that she shouldn’t be, she’s just being a baby that’s learnt to crawl and stuff. we got to make the environment suitable for the little ones. get some crash mats, that interlock, keep hot things pushed back so she can’t pull them down, put locks on cupboards and pantry’s, a little ball pit with a few balls to keep her occupied, like a mini soft play set x