My DS is 7 months, and is crawling and getting into EVERYTHING. his favorite activity is chasing our cat. He likes to chase after him and once she runs away he finds something else to get into, cords, bags, anything he can get his hands on. It makes me nervous because if i take my eyes off of him for more than 2 mins he'll be across the room. I'm a FTM, and just curious when you other momma's starting teaching your child the word no. or what's a appropriate way of teaching him the things he can't play with and the things he can't. It might sound silly but i'm just confused

Any help is appreciated!
Re: Saying no
Henry Cavill...You're welcome!
BFP #3: EDD 1/10/13 **DS born 12/30/12!!!**
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BFP #1: MMC discovered on 12/6/10
Start now! There is nothing wrong with saying no (although some people would say it's too "negative," I personally find that to be over the top -- much like giving trophies for last place).
Obviously there is no need to yell. Just a firm "no" and perhaps a finger wag, followed by immediate redirection, worked well (and still does) for my DD.
But redirection is the key -- and will be for a long time. Distract with something else, offer a toy or another safer thing to play with.
Even now, my 28-month-old DD, for example, will start screaming and crying when we say it's time to go up to bed. So I say, "Hey, where's Baby?" (her doll that she goes nowhere without), and she IMMEDIATELY stops crying and says in the sweetest voice, "Where is she?" and starts looking.
LOVE redirection.
The KEY thing right now for your 7 month-old son, is to make sure your house is safe & baby-proofed. If there are items you don't want your baby to get hold of, just put it out of the way so he can't reach it.
We have hidden all our electric cords (except for the cable for TV) from DS, so he won't get into trouble. When he reaches for that one and only cable, I'll tell him no and shake my head. He is slowly learning "no". But at this age, REDIRECTION is the most effective method. Babies this age are curious and they are out to explore. It's the job of the parent to make sure that the things they explore are not dangerous. They are not misbehaving (they don't learn that until much older), it's just their innate nature to explore.
Failed multiple cycles of Clomid+TI and Clomid+IUI
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Fall 2011 inj+IUI #2&3 BFN
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Our IVF miracle, Baby Boy M, arrived on 11/8/2012!
We've babyproofed, but with our twins we have "I want the toy she has" issues. We noticed that our DC uses "No, thank you" with redirection. We've employed that at home so our girls are getting a consistent message.
They also both respond to their names (first and middle) said in a warning tone.
I'm glad you said this because it was the first thing that came to mind when she listed off the things he's getting into! Definitely time to baby-proof.
Pretty much this. I try not to say no too much, because it sucks when they start saying it back to you. All. The. Time.