What are some ways to correct yourself in speech?

What are some ways to correct yourself in speech?
 

For example in English if someone is talking and they make an error in their choice of words, they can say something like "______, I should say" to correct themselves, or "_____, pardon me".

Are there any good, perhaps common ways to correct yourself in spanish? preferrably Mexican spanish. Thanks for the tips!

______. Perdón, quería (o quiero) decir____
______. No, no es eso. Lo que quiero decir es_____

How about any of the following?

____, digo ________
____, o sea _______
____, o mejor dicho _____

Pues claro que también. Se usan muy frecuentemente.