I took some time off work when I got Jake. Every second that Jake wasn't in his crate, I had him with me on his leash, keeping a very close eye on him. As soon as he looked like he was even thinking about going potty I'd say "outside!" and run outside with him as quickly as we could go, then when he went I praised him immensely.

It took less than a week to housebreak him.

When he was 3 years old and we got a new dog who wasn't as dependably housebroken, Jake had a few accidents. Since he only did that at night I solved the problem by confining him to the mud room at night until he was dependable again (he wouldn't potty there because that's where he sleeps and eats).