It's very hard to do it yourself. It turned out pretty good.
Find a place that sells salon products to the salons as well as the public and bought what You needed there.

Mix the product and use the straight end of the comb to go in and out and pick out very thin pieces of hair. Put foil under those strands you've picked out and put on the highlighting cream and fold it up nicely. Do many along the "top" part of your hair and use clips and do some underneath...depending on if your hair is layered or how it's cut, about 20 "foils" are usually enough. Start at the front and work one side of the head, then do the other and try to do it similarly and leave the back. Don't do TOO many the first time or you'll end up "all blonde".

If your hair is shorter and layered, remember to work down and make sure you've gotten strands from everywhere. The "top" part of your hair is the most important because that is what shows but remember not to overdo it. Don't be too "straight" in doing your hair either...or you will end up with that "row" of highlights which looks unnatural...you want it to be sporadic and not systematic.

If you are not sure, do just a few, and then you can go back and add more the next day, or in another few weeks.

I prefer the blonde type streak rather than the brownish ones (I have dark brown hair) as they look very nice when you use a straightening iron. The other ends up looking reddish which I don't like.

If you use the products you buy in stores, just do the same...do little streaks all over the top part of your hair where it's visible, then work some streaks in under and in between.

DON'T make big wide globs unless you like that "chunking" look...if you are looking for soft fur like looking hair...the thin streaks look gorgeous, especially with the straight iron look.

If your hair is TOO streaked start over, die it brown or whatever and then in a week or two put highlights back in. I don't like touching up outgrown streaks...you always miss a few here and there.

This is what I do and it works great! Mix about 1 part water to 1/2 part lemon juice (I prefer the bottled lemon juice). Mix the solution together and place in a deep plate or bowl. Next, use a wide-tooth comb and comb this mixture throughout your hair. You can highlight all over or use only in strategic places. Leave this solution on your hair for about 1/2-1 hr. and activate the mixture from either the sun (if you live in a sunny climate), hair-dryer or blow dryer. The heat helps cause the acid in the lemon juice to "go into action"! Rinse throughly and condition. If you want more highlights, repeat these instructions (do it twice or more). I have medium brown hair and this trick can probably also be used for those with darker hair as well as those with dark blonde hair. I used this technique when I was highlightening my hair and my hair stylist even commented on it and said that it looked professional and natural. Let me know how this works for you.

There are several good drugstore highlighting kits on the market. Check out a product called Hi-Light Styliste by Loreal. I've had great success with it. The kit comes with everything that you need: 2 types of applicator wands, highlighting mixture, gloves, and conditioner. You can also use the website to pick which color choice will work best for you. It's basically fool-proof! Plus, it's pretty inexpensive compared to similar products. It retails for around $10 a box.

official website:
http://www.lorealparisusa.com/highlights-and-professional/hi-light-styliste.htm

reviews:
http://www.makeupalley.com/product/showreview.asp/ItemID=65702/Hair_Color/L

http://ecx.images-amazon.com/images/I/31yYAn54s8L._SL500_AA200_.jpg

Other options: Garnier Nutrisse Multi-Lights or Loreal Frost and Design

For general at-home highlighting tips, look here:
http://www.beautysecrets101.com/at-home-highlighting.html
http://www.cosmopolitan.com/style/tips/at-home-highlighting
http://www.cosmopolitan.com/style/tips/home-highlighting