Do you want to know other methods?
Well, I'll name a few:
You can fish in the water, consecutively. Self-explanatory. xD
Here's a lovely link. :3
The Masuda Method makes a triumphant return in X and Y, and with the already increased shiny chance in X and Y, the Masuda Method is really helpful in getting shinies. Simply get two compatible Pokemon from different-region games (NOT languages) and breed them. The chance of them producing a shiny is increased! :D
There are also rumours that the Friend Safari has an increased shiny rate. So you can search there for Pokemon, that may not even be native to Kalos!
Although the least-effective of the bunch, it's helpful. Since 5 Pokemon appear in a horde, it's 5x the chance a shiny Pokemon will appear in a horde.
Hope I helped. :)