Starting again your old compost heap

An old compostheap might have "died" during the winter, and it will take a long time for nature itself to start it again.
A bit of help consists of:

New leaves and grees waste on top.
Raking the old compost and new additions together.

taking compost from the bottom and adding that to the top.

And throwing a few buckets of hot water over it.

When it's an open air compost heap adding plastic on top to have the heap "breed" for a few days will help.