实用: practical
四手结: four-in-hand knot - http://en.wikipedia.org/wiki/Four-in-hand_knot
更添: results in even more (something along this line)

干练: 熟练, basically to do with competence, capabilities and experience
风: something to do with trends and style
However, when 干练 is combined with 风, I'd say that it means something like to look neat and professional (in view of the context of tying a knot)
BTW, how to make tie knots: http://www.ehow.com/how_7360425_make-tie-knots.html

Putting these together, I'd say that the meaning is something like this:
Practical way to tie a four-in-hand knot for a neater and more professional look

If this is a title, you might want to reword it to make it more catchy and sound more like a title.

Hope this helps.