Object placement is easy if there’s no order to it. Just place your object where you want it and you’re done.  Aligning objects with absolutely even spacing along the vertical or horizontal plane is another matter entirely. Just "eyeballing" it is adequate at best. Instead, use the Alignment tool to do the job for you. All you have to do is approximately place your objects in the way that you want them to be arranged, select them all, and click on the appropriate alignment option. There are 8 different options.

You can align to the left, right, top, bottom, or center of your document and distribute widths and heights.  Below you will see an example of the alignment tool at work.