I recommend getting the Super Baby Food Book by Ruth Yaron. I made all my own and it is so confusing at first! But the book gave some great ideas and laid out a very good eating plan. It was filled with good info about how to pick, cook, and store produce also. I give it as a shower gift now if I know they are interested. It makes it much easier to figure out, and you can do as much or as little as you want from the book.
Here are my two favorite websites also:
http://www.homemade-baby-food-recipes.com/index.html
http://www.wholesomebabyfood.com/
and here is a food blog from a mommy who makes her own babyfood. Check it out when you have time to get ideas of recipes and combinations for later on: www.weelicious.com
Personally, I did squash first. I did several yellow veggies, then green veggies, then fruits. But I didn't stick firm with that rule if there was a good price or something looked good at the store.
I did cereal first, then added a veggie at dinner. So I kept the cereal feeding for breakfast, then veggie at dinner. After a couple/few weeks he seemed to need another solid feeding, so I added in lunch. At that point, for one veggie/fruit feeding I would do something we had already introduced (I used a 4 day rule, but I have heard 3 too) and then for the other feeding I would give him something new that I was introducing. It wasn't long before my son didn't want plain cereal anymore. I would sometimes mix it in the veggie, but not always. Once I started doing fruits, I would do those for breakfast mixed with cereal, and veggies for lunch and dinner.
There are really no rules about it, you will quickly see what works good for you. The only thing that I would say should be a rule is about waiting 3 or 4 days between new food. And no honey before a year. I gave my son everything else except choking hazards by slowly introducing them. He did great. I worked my way up to the more acidic stuff, and didn't do yogurt until 8 or 9 mos. No cows milk until 12 mos. See if you can find that book, it is in bookstores and sometimes on Amazon for much cheaper, it was a lifesaver. And if you have any questions, feel free to ask. Good luck!