1  

Assuming , then and puts a lot of pressure on the and stones. While some may argue that the Black stones are too close to the White stones, I prefer this result over the two-space jump result, because the two-space jump result seems too slack.

2  

This aims at the aji of the cut at a. The stone can be treated lightly.

If at a, then this exchange already profits Black, so can consider playing at b.

If at c, then can play at a to threaten cutting off the three White stones on the top.

3  

I don't claim I have done enough reading on this one. But just another sequence to think about.

Of course, for this particular position, another possibility is just to tenuki. But I might prefer to try to make sabaki before throwing away the sabaki stones, if need be.