These little buggers can catch you if you're not watching. If you remember the following guidelines, though, you'll be fine in most situations.
With Infinitive Verbs (An infinitive is the non-conjugated form of a verb.)
I need to walk the dog.
To consider new proposals, we require at least half of our membership to be present.
As a preposition, “to” means “in the direction of”:
How do you get to Carnegie Hall? Take a left on 7th Ave.
Conor is fighting Pacquiao, too?
Measure of Intensity
Oh, this chocolate cake is too much!*
*A good way to remember this usage: "too" feels like it has too many o's.