A cheeky little ork move I used and worked quite well that may seem really obvious....and its not a waste of an HQ, despite what some people might think, which makes for good discussion so read on and comment ^_^
When holding an objective with a jumpy and nervous squad of grots who are more likley to run than hold their ground with any sense of bravado, stick an HQ in the squad to bolster the LD value, it bumps the squad LD to 9 from 7 (Runtherd) and if the LD test fails roll a D3 and let the squigs eat a few grots and re roll, better odds of passing with a LD of 9 than 7.
With a squad of 30 grots, this means they will hold their ground longer and possibly even take out a few of them pussy Dark Angels J keeps using against me ^_~ makes the Grots a reasonable squad to hold an objective with and less of a liability.....and they're cheap points to ^_^
Waste of an HQ??