If your going to queue for access to the ground - outside courts only - make sure you get there early (some people take a sleeping bag and queue overnight); I've seen people get turned away when the ground is full.
BTW, during the first four days, the best (or at least closest) matches are usually those on the outside courts anyway, so I'd only enter the ballot for second week tickets, unless of course you just want to see the 'big names'.
Man, proud man, drest in a little brief authority, most ignorant of what he’s most assured,
his glassy essence, like an angry ape, plays such fantastic tricks before high heaven,
as makes the angels weep.
William Shakespeare (anticipating George W Bush?)