My brofur make a comment in his blog about going a place he not allowed, which caused some cats to say "You mean there are places we're not allowed?"
In all households, there are some places a feline should not go. The stove - for example - should be off limits always for obvious safety reasons. Establishing an off limits rule even with the stove not in use, could help to prevent injuries later.
Common sense should rule. Some humans do not like their cats on their counter tops and food preparation areas there they might run across things like sharp knives that could injure them.
To keep a cat off someplace they are not allowed - like counter or stove tops, try temporarily applying double-sided tape to the edges of the surface. Cats dislike the sticky feeling on their paws. (My bean says if you have trouble getting the tape off later, nail polish remover works wonders.)
An alternative is to purchase a mat made for keeping cats off counters. It is plastic mat that emits a small static shock when touched. This way the cat will be discouraged from going someplace he or she should not, even when the human is away from home.