Medication like minoxidil does seem to work but the result are not permanent. The moment you stop using it you start loosing the hair again. Surgical implant treatment is way costly.
The best thing is that all the time you used to listen to music or audio books would now also be adding hair to your scalp. All you have to do is just place the helmet type headphones ,switch it on and start listening to your favorite songs. There are several red lights "LED" light emitting diodes inside the hood of the headphones which would do their job painlessly. According to "American Society for Laser Medicine and Surgery" Use it twenty minutes everyday for at-least 4 months and you would start noticing a 40% increase in hair growth. Isn't it amazing?. Amazon link for iGrow.
There is one drawback though. The helmet design is kind of silly but who cares as long as you get your hair back.If you are not into music than another device without headphones is also available called "Oaze Hair Beam" you can buy it from amazon.
It pretty much do the same job but no headphones. Amazon link for Oaze.