While it is convenient to add applications to the Login Items* list, it is also annoying when it takes ages for all of them to launch before you can do any meaningful work.
(*) In the Settings applications, select Accounts, your account and then the Login Items tab.
It occurred to me that one or the other application does not need to be available at login, but it would be nice to load it later. For instance, I don't use Skype during the day, but more in the evenings to contact my friends. So how about launching Skype at 5 p.m.?
launchd specification will do exactly that: launch Skype at 5 p.m. (or when not possible, whenever you log in next time):
Label com.skype.skype ProgramArguments /usr/bin/open /Applications/Skype.app StartCalendarInterval Minute 0 Hour 17
Save this file as
~/Library/LaunchAgents/com.skype.skype.plist (note that the Label must correspond to the file name) and wait for magic to happen when you log in next time...