I was asked for these when contributing to a business survey recently.

1 – Set up rules in your email management system to reduce the time absorbed by incoming emails.
2 – Book time in your diary for regular activities such as bookkeeping, invoicing, personal development, replying to emails etc. If client work has to be done in a slot reserved for key activities, move them to another date – in the same week.
3 – Set up a simple strategic plan with month by month activities to ensure you focus on working ON building your business beyond simply working IN the business. Then monitor and work that plan. (And reserve time in your diary to do this each month)

What else do you find works for you?