https://www.google.co.uk/search?q=iso+14001+requirements+checklist

Quite hard to summarise as standards are quite in depth but in general:

• Complete a gap analysis of where you are now where you need to be to achieve the standards.
• Leadership commitment - absolutley key and vital.
• Management reviews with Leadership atleast annually.
• Lifecycle analysis of products and services you use.
• Control of outsourcing (contractors, services).
• Look at external and internal issues that affect the organisation (i.e. PESTLE analysis, climate change)
• Context of organisation - what are the needs and expectations of interested parties.
• Management system processes and procedures.
• Policy commitments.
• Communications, awareness and competencies.
• Environmental impact assessments.
• Understand compliance obligations (Legal, customer requirements and what needs/expectations of interested parties then fall into a compliance obligations). Understanding where you are with compliance obligations i.e. RAG status.
• Carrying out internal audits of compliance obligations and ensuring that you audit each of the standards in a three year period.

These are all of the top of my head but there are great summary documents available on the internet.

Georgia