Preferably economic, recycled ones which are straight-cut or 1/3 cut (http://tinyurl.com/2q66cw), though this isn't strictly necessary.
Failing that, are there any workarounds for making the tabs on foolscap-size tabbed folders stick out beyond the hanging "Pendaflex" folders? I'm reluctant to staple the bottoms, and the trouble with both paperclips and staples is that heavier file-folders may rip the staples/force the clips off the file.
I know a lot of UK/European GTDers are keen for the answers to this question, so all contributions greatfully received!
Thanks for your time,