Some Revit Architecture Modeling Best Practices

Try to limit the use of joining geometry.
Do not over constrain objects. Try to keep constraints to a minimum. This will help keep “Can’t keep joined” errors to a minimum when moving objects. This may also help prevent workset ownership issues where a user may unknowingly take editability for an object.
Minimize view depth, if possible, in elevation, plan, and section views. In addition, use section boxes when working in 3D views.
Groups are heavier than families. You can use an array to copy and associate objects together. However, after the array is complete, you can ungroup the arrayed objects to increase performance by removing the parametric associations of the copied objects. You can also clear the Copy and Associate check box when creating the array.
Close unnecessary windows. When working in a 3D view, most of the file is placed into RAM. It is also strongly recommended that you close these views when saving to a central file, because these views are regenerated as part of the process. It is best to save a 3D view with minimal visibility and then copy it to create new views faster.
Avoid opening additional views, if possible. It is better to not open a view at all rather than opening one and then closing it, as not all memory is reclaimed when you close a view.
Turn off shadows in most views. (Turn off shadows when printing views if not absolutely necessary.)
When making significant changes to a project (for example, moving a level or making major geometry changes) it is strongly recommended that you perform these operations when no other users are working on the file and they have relinquished all elements. Then have user make new local files.
Using the Paste Aligned command in a closed view actually opens the view (which takes time) and then closes it. If you want to paste several times in a view, open it first.
Limit the use of rooms in design options, as additional time is spent detecting room option conflicts. Use separate models for variations of the whole wing with rooms.