Original: If you have Safari, you can try it [here].

Better: If you have Safari, [you can try it].

Best: [Try it on Safari].

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Original: The tuning code can be found [here]. The basic idea is...

Better: The [tuning code is available]. The basic idea is...

Best: The basic idea of the [tuning code] is...

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See how explicit it is? How it reads better, but also how anyone scanning the blue links immediately gets an idea of the link's destination? Do you prefer reading things in two steps or one? This way, the link text informs, rather than being a reference back to previous text.