Let, Make and Help - common error

This short lesson which I got from "Tip of the day" - About.com is very helpful. Most of learners confuse this tip, me too, always adding "to" without the reason. Now we got the clue why not to use "to" all the time. Here we go:
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Let, Make and Help

With the verbs "let, make and help" we use the following structure: S + let, make or help + object + verb without to

For other verbs that take this structure we use: S + verb + object + verb with to

>> Example Sentences:

She let him stay out late.

What did your father make you do?