1. Edit Shortcut tu start SSMS and append this startup parameter: -nosplash
2. Open system Internet options, go to the Advanced tab and uncheck "Check for server certificate revocation" - this change reuqires system restart.
After that both changes startup time (by me) is 10 times shorter
Additionaly you can reduce clicks by predefine other startup parameters.
For example for localhost, trusted connection and USE of MyDatabase:
..../SSMS.exe -S . -E -d MyDatabase -nosplash
I also set this option:
SSMS Menu / Tools / Option / Environmen / Startup / At statrup = "Open Object Explorer and query window"
