From Longman Dictionary of Contemporary Englishyour best betyour best betspokenADVISE used when advising someone what to do Your best bet is to put an advert in the local newspaper. The train might be a better bet. → bet
Examples from the Corpus
your best bet• We decided that our best bet was to leave him where he was and go and get help.• For getting around the city centre, a bicycle's your best bet.• Well, your best bet would be to go back to Highway 218 and turn left. 