Bugger, locked out again!!!!!! After the locksmith has let you in, ask them if they sell lockable key storage boxes?
These handy devices can be secured to your front security door, gas meter or your front tap. They can securely keep a spare key in them for these unexpected emergencies. There is also a version that can be mounted to homes brick or timber wall of your home. This is a much better and safer way than leaving a key hidden under a pot plant or rock that may leave you uninsured with your insurance company. They are also great to keep at your elderly relatives home as well for emergencies. The best and well know brand ones are resetable and this means you can change the combination on them as many time as needed. They are also great way to leave a key in for the tradie who may be coming when your not home( instead of leaving a key in the leter box.)