By minimizing the amount of accommodation (near-focusing) your eyeshave to perform. This does not necessarily mean you have to avoidclose-up activities like reading and using a computer. It ispossible to avoid accommodation while dong this with the use ofreading glasses. This practice is known as plus-lens therapy.
The reading glasses allow you to ensure your eyes rarely have tofocus any closer than the furthest point at which you can seethings clearly. This is achieved by bringing your focal range incloser, effectively making you more myopic. For those who spend alot of time looking at a computer screen about half a metre away,giving yourself 2 effective diopters of myopia would be ideal -your focal limit is approx. 1 metre divided by the number ofuncorrected negative diopters.
The strength of reading glasses that would be appropriate woulddepend on what your current prescription is. Using reading glasseswould only really be feasible for those with a prescription nostronger than about -1.50 D. Simply add +2 to your prescription tofind the required strength, e.g. say you were -0.75... -0.75 + 2.00= +1.25. Reading glasses can be bought fairly inexpensively onEbay.
Those who have close to 2 diopters of myopia to begin with couldbenefit from simply removing their distance glasses when on thecomputer or reading. Those with higher prescriptions, i.e strongerthan -3.00 D, may like to consider getting a reduced-strength pairof glasses specifically for reading/computer use; one that is 2diopters less than their full prescription. There are some low-coston-line glasses suppliers that can make this easier on your wallet,e.g. zennioptical and goggles4u.