Easy way to check for toe-in? Options

[TonyAKAVW]

I just received tires today to replace my front tires, which have worn on the inside much faster than the outside. My rear tires still have a lot of tread, whereas the fronts are basically bald on the inside. My guess is that its either toe-in or camber. The wheels don't look cambered any more than the back, though the front of the car does sit a bit lower than the back.

So my question is, is there a way to easily check to see if the front has too much toe-in? I was thinking about rigging up some laser pointers or something, but I don't know.

I would like to avoid getting an alignment because later this year I'll be putting on my carerra front suspension. For now I'd just like to prevent premature wear of the tires.

Tony