I have just deleted my Twitter account (@petercrow1), a conscious decision to step away from what is essentially a soapbox for soundbite-length pronouncements. Self-proclaimed experts who offer opinions (packaged as answers but lacking context) actually contribute little, except noise and clutter—and I can do without that.
My intention is to pursue more meaningful exchanges of ideas elsewhere. Challenging problems (how boards influence company performance, for example) need devoted time and space for critical thought and analysis. They cannot be resolved in 140 characters. 
If you are interested, my thoughts on a range of topical matters including inter alia corporate governance, board effectiveness, strategy, the board's role in company performance and the compliance–performance dilemma will continue to be shared online, on LinkedIn, this blog and in published articles. Please read and debate them with your colleagues, and share your thoughts (especially strong or opposing views!). If you have a question or a request, ask and I'll respond promptly.
If you have a preference for in-person discussions, as many directors do, I am available to explore topics of interest, either publicly at conferences or other forums, or privately at workshops or confidential briefings.