Sometimes you have several projects you work in team. It's good to synchronize all of them before you start your daily work. Here is simple bat file, wich will do the work:

@echo off
set svnupdate=start "" "C:\Program Files\TortoiseSVN\bin\TortoiseProc.exe" /closeonend:3  /command:update

%svnupdate% /path:"d:\project1"
%svnupdate% /path:"d:\project2"
%svnupdate% /path:"d:\project3"

Start command is used to run TortoiseProcs simultaneously.