Try keyword searching even if searching for a title--sometimes a subtitle or a subtle variation can throw off the search.
It's usually most convenient to start local, and then move to larger--so begin in the Penn Valley catalog and expand your search, as opposed to starting with the widest net possible.
Start early, if you can, so you can maximize your resources through KC Towers or MOBIUS.
When requesting from MOBIUS, make sure the item is Available in at least one library--items are shown even if they are checked out!
You can limit to just physical books on the results page by clicking Modify Search, and selecting BOOK/JOURNAL under "Other Format"
Search here to find items that should be available immediately in the library--make sure to select MCC Penn Valley from the drop down if you don't see it!
