I posted a topic about web design process yesterday now I want to talk about web development.
Personally I want to stress on UML (Unified Modeling Language) , which I use to engineer the whole working of the application in terms of user cas models, requirement model , test model, and class model [ incase of OOP ].
This is no joke with some UML tools like microsoft Visio or Enterprise Architect 2.0 you can just draw functions and their required actions then the software writes the codes for you.
Ok enough of the marketing of UML and the rest
when i have a client project, and we have all the requirements, our designer starts the design works, and our database guys starts the databasee works, while I work on the architecture. We employ MVC design pattern where the database has nothing to do with the html pages. there is always a function that communicates between the two so that if we change the database anytime the html pages wont change more information about MVC and UML can be found on these links

http://en.wikipedia.org/wiki/Unified_Modeling_Language

http://en.wikipedia.org/wiki/Model-view-controller

i dont know how you do your own but I would love to learn. Tunde , yawa I need some help here