I often play the Sicilian, and out of that, sometimes I end up in situations like the one below, when my dark square bishop is fianchettoed and my opponent is getting ready to get rid of my bishop (after Bh6 the bishop exchange is forced), leaving me with dark square weaknesses.
[FEN ""] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2
How do you defend in such situations? Is there a general idea or solution to this problem? Or should I just ignore my weakened dark squares and try for a good bishop vs. bad bishop game?
I'm more interested in general tactics than specific lines, in other words, ideas that can be applied to other games, not only this one. This situation can occur for both sides in lots of openings.