Yup, make sure the pup is always in your sight, which means use a leash! Anything that looks like restless behavior (unable to settle, sits, stands downs and stand over and over walking in between sits or downs) as well as sniffing, circling, pacing, scratching floor etc. But for now pups needs to go out every 2 hours or so. When you are not home I suggest crating him so there will be no accidents. Always reward for outside potty and make sure there is no playing outside until AFTER the pup goes potty so she'll know outside always means business first.
Other than that, read the stickies and do a search, you'll find a lot of info here.