This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Order your all of you inserts/updates in a single transaction to always update all tables in a specific order (for example, always update table A before table B, table B before table c, etc for all transactions). This prevents locking due to cycles.
Many times though, such ordering is difficult to implement.