Simple really.

Use a standard 4 or 5 pin relay.  Make sure it's good for 30 amps.  No you don't need 30 amps, but you do want quality relay contacts that will last.

Start at the closest strongest power source.  In our cars that's the battery post on the back of the alternator.  Put an inline fuse, 20 amp will do, and use 14 gauge wire from the alternator to a relay.  Connect it to pin 30, which is the battery feed on a relay.  Run the output from the relay, pin 87, to the headlight bulbs.  Use the original headlight feed to the bulb to activate the control circuit of the relay, pin 86.  Then ground the other relay control circuit, pin 85.  This will take care of the low beams.  Do the same thing for the high beams.

Instant brighter lights.  How much brighter will vary.

 

Before doing any of this, make sure the headlight bulbs have good reflectors and are in good condition.  Also, make sure they are aligned properly.  2 inches off center at 300 feet will lose almost 50% of your light down the road.

 

Highbeams are centered dead ahead of the car.  Adjustment you lights to this point.  Low beams are designed to point down 2 inches and to the right 2 inches.  This is to prevent blinding oncoming drivers.  Consider the difference with the 2 inch alignment difference between high and low beam, and what you can see in front of the car.

 

Another option is to replace the sealed beam bulbs with conversions that use a halogen bulb like the newer vehicles now use.   The only problem may be the halogens use more power and could trip the circuit breaker built into the headlight switch. (ever wonder why there is no headlight fuse?)   Sometimes it will only trip when the highbeams are on and you are powering up 4 lights instead of only 2.  If you run into this, use the relay system described above.  Yep, now they are really bright!

does that mean using h4 and h1. I will  have 4 on dipped beam,the 2 main plus the  bulbs(h1) stay on when switch to hi beams?

The metal part of the headlight switch got real hot. 

I installed two relays, one for the high beam and one for the low beam. They work great and so much better lighting. About a four hour job installing the relays and new 12 gauge wire. I put the relays on the drivers side lower fender well. I tied into the existing green wire for the high beam coming from the dimmer switch, and the tan wire coming from the headlight switch for the low beams relay. I ran a 12 gauge wire with a 20 amp fuse to the alternator hot side on both relays. I think these are called 87 relays. 

I went on line to Daniel Stern Lighting and read all about the relays and wiring. Very good info. site. Also Mad Electrical has some very good info. 

Now I have all the power coming from the relays to power up the headlights, and the headlight switch is not over powered, getting hot  and thus going on and off.