I hear this all the time, How do you load presets into lightroom?

There's several ways to do this.  But I'll tell you my way.

Open Lightroom

Go to the Develop Screen

At the top of your preset list (on the left) you should see a folder called 'Lightroom Presets', right click on that.

You'll see the option 'new folder' pop up, choose that.

Now, what I do is...I name that new folder the name of the person/website that created a set of presets I'd like to load.  That way everything is organized and easy to find.  Once you've chosen your name click 'create'.

Now you'll see the new folder you named and added in your list on the left.  Right click on that new folder and choose 'import'.  Go find where on your computer you saved the lightroom presets and choose them and then click 'import'

That's it!  Now you can continue to make new folders for each set of presets you have starting back again at the top of this tutorial and right clicking on the 'Lightroom Presets' folder.

Hope this helps :)