He sounds like my Tyler. I used to call him "diablo".

Seriously I had to use reverse psychology with him because if he even got a whiff that there was something he shouldn't be doing, you could bet that he'd do it on purpose. I think the question in his mind was not 'will this hurt?' but 'how much will this hurt?'. IDK if it's a boy thing or a personality thing.
Anyway, sorry....back to your question. I don't do time outs until a bit older, maybe around 2. Right now I try to redirect the attention away from whatever it is Miranda is doing. Or I take the item away, if it's something the kids are fighting over. My DD likes to leave the remote lying around and Miranda will always get it and press all the buttons. Gotta make sure the 'temptation' things are not in sight. I also have a gate in the kitchen, so that the little ones can't get in. That is one way I have solved the stove/fridge/drawers being opened problem.