Well im a new member to the site and pretty new to blender, but i have been reading forums here for a few weeks. Sorry for this probably real simple question. What I am trying to do is make a pool table, and trying to form the “corner pockets” and “side pockets” of my Rectagular mesh. I am having trouble coming up with an effective way of doing this cleanly. If anyone could give me a pointer on how you would do it, that would be awsome. I know im a newb so no need to point it out to me… 
j/k
You might find something you can use at one of these.
https://blenderartists.org/forum/viewtopic.php?t=59665
https://blenderartists.org/forum/viewtopic.php?t=39801
https://blenderartists.org/forum/viewtopic.php?t=37291
On the wiki there is a tutorial on making a dice. Maybe that could come in handy? It involves making dents to mark the dots on the dice.
And welcome to elysium!