teething - signs the tooth was almost here

[MrsPatMustard]

I was wondering if any MN folk could share any wisdom. I know all the general signs of teething: drooling, chewing etc but this can go on for months. Is there any way of telling that the tooth is about to imminently appear?

Should be able to see the tooth through the gum, just a little white line. DS started showing teething signs at 2 months, not a single tooth until 10 months!