Conventional sockets apply pressure to the shoulder of a fastener and on frozen ones can round off the shoulder. This is especially true with 12 point sockets and box end wrenches. Lowes carries sockets and wrenches which apply force to the fastener flat side. In fact they will often remove rounded fastener that regular sockets/wrenches can't. About the only downside is you may have to knock a rounded fastener out of a socket, but once loose a light tap with a hammer/drift pin will free it up.

I have been seeing Mr. Handyman shows where they are not using adjustable wrenches correctly. The moveable jaw should always be pointed down when using just like a pipe wrench. Never pull with moveable jaw on the top since the maximum force is now applied to outside tip of the moveable jaw and it could break and you might injure your hand.