Seen similar lifestyle tips in a mainstream newspaper so thought I'd give it a go.
My first tip: When deciding whether or not a pair of trousers in the shop will fit your waist, there's no need to go scurrying to the changing rooms (if they have one) to try them on for size, simply try wrapping the waistband around your neck, if they fit your neck they'll fit your waist.
Tip two: Ironing a shirt. The day before ironing, liberally soak your shirt with water from a spray nozzle bottle and leave the shirt in the freezer overnight, it's a piece of piss to press it next day when it's nice and chilled.
Tip three: For razor sharp creases in trousers, turn them inside out and run the edge of a bar of soap (if you have one) along the crease, then turn them back and press. Voila, creases you could shave with (Not literally of course).