Anyone know how to practice looking several moves ahead?

A lot of games Ive been losing lately, and tactics, Ive been failing, seem to be for the same reason. I keep missing mate threats coming until its too late.

I struggle this way with tactics, too. I have a really hard time with tactics that are three or more moves deep.

Any suggestions? Especially relating to mate threats?

Thank you!

Take a look at this.....

http://www.chessimo.com/

Or maybe even this: lichess.org/training

Here with some comments: http://www.youtube.com/playlist?list=PLpbSCK-lQ8KeaMLAN3weXzYfOp3sL_Zew

For the most bizarre reason, i suggest fighting lessons. I have to tell that i have a special feeling when a mate is near that is almost as clear as the eminence of a fight. And when i can't escape from it, the sensation of "clear hit took me to KO and now i'm realizing where i should prepare myself for this attack whenever i'm on this situation again" fills my need of playing that kind of game again.

Seems bizarre, as i said before, but is somewhat accurate. Instincts add something to tatics that is irreplaceable.

(Sorry for my lousy english :P)