What are some best practices for checking a Mezuzah (as the Mezuzah owner, not as a Sofer)? Some questions that come to mind are: 

Should all Mezuzoth in a home be checked at once?  

What should one do if one has a Mezuzah case held up on the doorpost by double-sided tape (as opposed to removable screws)?  

What should one do if removing the Mezuzah will damage the Mezuzah, case, or doorpost?  

Should/can one leave the doorpost Mezuzah-less if it will be some time before they are checked by the Sofer and returned?  

If someone lives far from the nearest Sofer, how should one get the Mezuzah/oth to and from the Sofer?

Feel free to add more issues, especially if you have a solution to offer.