I use my camelbak on every ride, it's the easiest way to drink. On hot days or for longer rides I'll add a large bottle, and put ice cubes in both. I carry electrolyte capsules and take them when it's hot. I've had heat sickness before, so I know the signs to look for: slight headache, arms stop sweating. In that case I either quit the ride, or find a shady spot to rest and cool off.

When I first started using a camelbak I had that "where have you been all my life" experience. It makes drinking so much easier. It's got extra storage space for stuff.