Wash linen at 30 degrees, shake it out and hang it to dry; skip the tumble dryer, which weakens the fibre. A light steam while it is slightly damp removes the worst creases without flattening the texture that makes the fabric appealing.
For colour, stay with stone, sage, navy and white. They age well and mix easily, so one shirt, one pair of trousers and one dress can be recombined for a week away.