My way of remembering its/it's is to associate it with his/hers rather than the typical 's.
`The cat stepped on his foot.`
`The cat stepped on its foot.`
Still, I don't get annoyed at its/it's because it's such an easy mistake to make. I still do it occasionally without meaning to. I don't quite get how people consistently get their/there/they're or loose/lose wrong, but that's just me.
Totally. The "loose" thing drives me nuts for some reason. Other types of misspellings don't really bother me unless there's a ton of them, but for some reason I always hear that one out loud in my head and it destroys my opinion of the writer every time.
`The cat stepped on his foot.`
`The cat stepped on its foot.`
Still, I don't get annoyed at its/it's because it's such an easy mistake to make. I still do it occasionally without meaning to. I don't quite get how people consistently get their/there/they're or loose/lose wrong, but that's just me.