I'm a little embarrassed to ask such a simple question, but if you don't know, you don't know and I figured everyone on here probably would. If I'm going to work on a project that specifies using 3/4" boards, what would be the best way to progress? I know if I buy some 1x hardwood from HD or Menards or my local lumber yard, most are going to be close to 3/4", some slightly less, but probably not all exactly the same. If I need to joint them to flatten any boards, I loose a little material and some boards are going to be different thicknesses and the only way to ensure that they're all the same is to run them through a planer, which then they'll all be less than 3/4". Should I buy 4/4 which I doubt my local lumber yard stocks. It seems like I would waste a lot of material reducing everything from 1" to 3/4". Ideas?

Again, sorry for the simple question. Thank you for any help.
Paul