Fast

1. Fasting: On Saturdays For Rahu 
2. Fasting: On Thursdays For Ketu

Charity

1. For Rahu Donate blue clothes, blankets, urad dal (Horse Bean) or coconut on Saturdays to beggars. 
2. For Ketu Donate brown cloths, blanket, black mustard seeds to beggars and feed black dog on Thursdays.

http://charitables.blogspot.com/

Rudraksh

1. Wear eight mukhi (eight faced) Rudraksh For Rahu 
2. Wear nine mukhi (nine faced) Rudraksh For Ketu

http://rudrakshainformation.blogspot.com/

KRS Channel

https://www.youtube.com/user/KRSchannel/videos?query=Rahu+and+Ketu