Do you want to know other methods?
Well, I'll name a few:
Consecutive Fishing
You can fish in the water, consecutively. Self-explanatory. xD
Here's a lovely link. :3
Masuda Method
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
Friend Safari
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!
Hordes
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. :)
Source: Experience