I can think of two ways that may help get you to the right objects in the SSMS Object Explorer. Both are SSMS addins.
1) Use the free SQL Search - when you need to locate an object, press Ctrl-Alt-D, type the name of the object, arrow down until you highlight the object, and press Enter. I will suggest to the SQL Search project team the idea to have a "recently used" list of objects as I think this could be a nice addition to the tool.
2) Use SQL Treeo to create your own custom folders in the Object Explorer tree. You can create a folder to put the objects you use most frequently, which could help avoid scrolling through a large list of irrelevant objects.