Ceiling fans should be set to warm weather mode (there should be a switch on the base which changes the direction of spin), you want them to pull hot air up (so the lower edge is the leading side) push cool air down, had it backwards

Cotton/baggy clothes: cotton loses all insulation properties when wet so its nice on a hot day, baggy clothes are generally more breathable

Self-misters are fine, but do not use humidifiers, lower humidity = faster sweat evaporation = cooler you

Drinks w/ ice and/or icecream: cold stuff inside your body will cool you down

Avoid the outside at 1-2pm: this is usually the hottest part of the day

For your laptop: buy a desk fan and point it right at your laptop, has the bonus of cooling you down too

Mythbusters had an episode about it