3. Practise Makes Perfect
Before I felt comfortable wearing heels out I would often practise walking around in them at home.
This doesn't mean that you have to constantly walk up and down the hallway trying to get your walk perfect (although you can if you want!) - you can sit down, watch TV, do a few jobs and basically do whatever you would normally do at home.
This trick will allow you to get comfortable wearing heels sitting down, standing up and walking around!