Over the years I have gradually developed a "foundation" cookie recipe, one that you can customize with your own add-ins like chocolate chips, raisins, oatmeal, spices, etc. Here's what I use:
1 cup butter-flavored shortening*
3/4 cup brown sugar
3/4 cup granulated sugar
2 eggs
2 tsp. vanilla
2 cups flour
1 tsp. baking soda
1/2 tsp. salt
*butter-flavored shortening turns out loftier cookies that don't spread out as much.
Cream together shortening and sugars until fluffy (in a stand mixer, start out on low until mixed and then beat on high for a full minute). Add eggs and vanilla and mix well. In a separate bowl, sift together flour, baking soda and salt--add to the mixing bowl and blend until smooth.
From this point, it's all up to you. You can add up to 3 cups of other ingredients:
--1 or 2 cups of chocolate chips
--2 cups of oatmeal and a cup of raisins (1 or 2 tsp. of cinnamon would not be amiss either!)
--a cup of shredded coconut and a cup of chopped toasted pecans
--a cup of butterscotch chips and a cup of chopped walnuts
--2 cups of M&M minis
--1 cup chocolate chips, 1 cup of peanut butter chips, and a 1/2 cup hand broken pretzel pieces
(I got this last idea from the food blog www.makebetterfood.com, which is also where I got the photo featured at the top. Their recipe is HERE.)