finger tapping... finer points to increase speed?

[Klangfarbe]

Here are some basic ideas to work with:



Then there is an old video from a guy named Kjell Benner. Pretty much the best introduction to tapping you can find (at least the best I know off ).

 

[ixlramp]

Lower tension strings (lower gauges) will help. The traditional, common, so-called 'medium' string sets are excessively tight for tapping. Lower tension will be fine for all your other techniques, will help you stop using unnecessary amounts of force in your playing (something most players do because they get used to traditional sets), and be more healthy for the body.
I suggest something like .030-.090.

 

[Les Fret]

I suggest something like .030-.090.

That's really low tension! That might work for tapping but not for most other techniques. Although there a few players who use such low tension like Mark King for example.

I don't think you have to use that low tension for tapping. You can use regular 45-105 strings without any problem. Having a low action is more important.