1) Manage the swap file
With enough RAM to run all your applications, then in theory you do not need a swap partition.
With SSD and HDD, put swap on the HDD only.
2) No Writes for Read Timestamps (suitable for SSD’s and hard drives)
Add noatime option to fstab to prevent access time stamp updates. Note: may not be possible in some mail server applications.
3) Minimising writes from the OS and applications
Add these lines to the end off FSTAB – writes logs to RAM
# Uncomment these after all server based applications installed – eg. apache
#tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
#tmpfs /var/tmp tmpfs defaults,noatime,mode=1777 0 0
#tmpfs /var/log tmpfs defaults,noatime,mode=0755 0 0
#tmpfs /var/log/apt tmpfs defaults,noatime 0 0
# none /var/cache unionfs dirs=/tmp:/var/cache=ro 0 0
4) SSD Performance – TRIM
add discard option to fstab mount options