I'd consider a phone in there too. We have one which saves me missing calls and also the Mrs can use it as an intercom to call me in.
Oh and for a workbench I got an 8ft length of kitchen worktop from Ikea's bargain section for about £5. No-one wanted it because it was bright bright yellow (can't imagine what was in the mind of the person that ordered it) but it's actually really handy for a garage bench because it's really easy to see small bits.
Although, to give you an idea of how messy my garage is: rather than tidy up the bench to replace the previous worktop (which was about half the size) I lifted it up and had someone slide the new worktop under it, then I dumped the old one onto the new one. All the junk was then roughly in the same place!