How to speed up the HFSS simulation time

I know that the time it takes to simulate an antenna varies with the complexity of the model but how can this speeded up? Any tips or tricks?
Thanks

If you're lucky, you could use symmetry planes to reduce mesh volume.

Use CPU with 2 cores and enable multicore solver in HFSS.

Add more RAM into the PC.

I was thinking more along the lines of within the software. Symmetry is an option, any other suggestions?

To rfmw

Where do you enable multicore solver in HFSS?
Is it also available in v10?

Regards

Yes I believe it is:

Tools - Options - Hfss Options - Solver