There is plenty of SugarCRM wisdom floating around. Tips and hacks are flying around. Great time to be a SugarCRM developer -

Email marketing campaign using SugarCRM

Performance and response time are critical issues. Fact that SugarCRM is written on LAMP affects performance characteristics. I think it makes it run faster, availability of good thriving LAMP performance management ecosystem helps.

How to consume Google Reader shared items with SugarCRM

Review of SugarCRM Developer’s Manual Authored by Dr. Mark Alexander Bai