Not all postdoc positions are on mathjobs. I know this because this year we have three postdocs positions available but I am pretty sure they are not on mathjobs (-: (EDIT: oops, they are now, but you can not apply on mathjobs, sorry)

If you really want to go to certain places, it never hurts to contact them directly even if there is no advertisements. You really have nothing to lose, and some positions may open up later.

As for teaching colleges, I have heard that they really want people who love teaching (which makes a lot of sense), and they can tell whether you do.

Not all postdoc positions are on mathjobs. I know this because this year we have three postdocs positions available but I am pretty sure they are not on mathjobs (-:

If you really want to go to certain places, it never hurts to contact them directly even if there is no advertisements. You really have nothing to lose, and some positions may open up later.

As for teaching colleges, I have heard that they really want people who love teaching (which makes a lot of sense), and they can tell whether you do.