Good earplugs: Speedo makes some gel silicone earplugs that work great. Target sells them sometimes but just order them online.
I just tried the earplug style referenced in your link - I stuck them in, determined there was no way they would ever work and pitched 'em in the wastebucket - another $8.00± down the drain.
Silicone plugs are the way to go, imho - just don't shove them in too far. Speedo isn't the only brand, either - there's another one more widely available but the silicone is much softer - almost too soft - the Speedo ones are relatively firm which seems to suit me.
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