Office Manager -Staff Manager - PA - Book keeper

Although succesful in my field of writing and copywriting I am hopeless with organisation and that of my staff. I need an honest, genuine trustworthy person to be able to not only manage my books, but my staff their workload, answer the phone and organise my meetings day to day.
Basically using OCD skills to bring me into check and do all the things that normally cut into my daily schedule.
This would be a strong relationship and someone with a sense of humour is a must, as I can be quite scatty and diabolical at times.
Although i ALWAYS meet my own deadlines ahead of time, I become frustrated when my assistants fail to meet theirs, often chasing them up, bordering on badgering, I would prefer someone who can do this for me.