How do you increase a stitch?

[Jempast]

I am wanting to do this pattern http://www.groupepp.com/dishbout/kpatterns/grfavorite.html and it says to yarn over for the increase stitch. I knitted several rows. Where I did every increase stitch at it is bigger than the rest of the stitches. How can I get rid of that?

[smokeyp81]

I think that in this pattern the yarn over is what actualy makes the "eyelet" row that outlines the square. If you were to do a normal increase, you wouldn't get the row with the "holes". Here is a link to different ways to increase stitches: http://www.knittinghelp.com/videos/increases

[mamaoso]

I did a baby afghan like that..

The "holes" around is for the edging and increases.

You just bring your yarn in front like you would to purl when you knit the next stitch just gave it a extra little tug. That might help get it a little tighter on the needle.