In German "to" and "too" translate into the same word "zu". It would therefore be great if somebody could clarify when to use which.
E.g. Is it "to dazzle" or "too dazzle"? "to dazzling" or "too dazzling"?
Too is used either as an adverb (as in your example "too dazzling," where it modifies dazzling, an adjective.) or to mean "also". To, on the other hand, is used as a part of the infinitive construction or as a preposition. "To go to the store, ..." uses both forms.
Since you mentioned German, here are some examples in translation:
In the first, zu modifies viel, and therefore translates to "too." In the second, auch can translate to "too."
In the first, zu is part of the infinitive "zu sagen," and in the second it is used as a preposition.
And in some cases, of course, zu doesn't translate to any form of "to" (Ich gehe zum Fuß, for example.)
Since the rules have now been well covered, here is a mnemonic device.
"Too" is used to represent excess or addition, e.g.
"I will be there too", or "There are too many monkeys in this cage"
So when expressing those ideas of "extra" somehow, use the word that has an "extra" O.
And "To" for everything else.
Also, you don't need this one since two/zwei don't cause the same confusion for a German speaker that to/too/zu do, but for the benefit of readers coming from other languages, here's a mnemonic often taught to children for the number two:
Since the W in two looks like a three (3) when turned sideways, that's your reminder to use "two" when counting.
Here's one way, Fabian, which should work in most cases. If the following word is an adjective or an adverb, use too. For anything else (except '2') use to.
Too is used with the following meanings:
In phrases such as "you are driving too fast," too is a submodifier, which modifies the adjective that follows it; that is what happens in "too dazzling" too, as dazzling is an adjective.
This is a tough one. Too and to are identical in sound (/tu/), so the spelling difference is strictly gratuitous. Illiterate English speakers wouldn't notice any difference at all. Luckily, too is much rarer, and has a very specific sense, and that's how you can distinguish them.
If /tu/ means so much that Not (Possible X), spell it too. Otherwise spell it to.