I guess you are using the latest CSSU Testing? If you are you don't mind a bit of package testing so I based my answer on this.
Currently... CSSU thumb is helps to fight the memory bottleneck. Swappolube to adjust IO settings. (Proposed Settings) Swap on uSD with [plug] my app FlopSwap. [/plug] Backupmenu is useful. You have to keep it up to date and take regular backups (especially after system changes). Kernel Power (latest is KP52) with Smartreflex on. I don't recommend overclocking myself I don't think it's needed but the maximum is 900Mhz with SR.