I found our sitters by putting a poster in the local shop window - it had a picture of Annie looking up at the camera all sad-eyed and explaining how her mum and dad were going to have to go out to work all day and would anyone look after her. I had a couple of calls, and she (and now Jeff) spend any days we're both out with a lovely retired couple at the top of our lane. They've been sitting for us for over two years now
We drop them off before work and pick them up when we get home, and pay them £10 per day (it was £5 per day for Annie on her own).
The only problem we sometimes have is when they're unavailable; so far we've managed those incidents by using a local dog walker or I've nipped home at lunchtime.