Custom UITableViewCell Best Practice?

I am always subclassing UITableViewCell's and drawing them in code. Is there a good tool to visually get rect sizes so I don't have to guess and check all the time?

You can draw the cells in Interface Builder - see Table View Programming Guide - scroll down to Loading Custom Table-View Cells From Nib Files - just make sure you follow the other recommendations regarding use of transparency, cell reuse, etc.