here is some remedies for the problems related to planets. 

Surya

For Surya or Sun related troubles and during the dasa or antardasa of sun: 

1.Worship the ruling deity Lord Shiva

2. Recite Aditya Hrudayam (stotra) daily or Gayatri Mantra daily.

3. Japa of Sun's moola mantra:

 "Om hram hreem hroum sah suryaya namah",

  6000 times in 40 days.

4. Recite the surya stotra:

Java kusuma sankasam kashyapeyam mahadutim

Tamorim Sarva paapghnam pranatosmi Divakaram

5. Charity: Donate wheat, or sugar candy on Sunday.

6. Fasting day: Sundays. 

7. Do  Rudrabhishekam on Sunday.

8. Rudraksha: Wear Ekamukhi or 12 mukhi Rudraksha

Chandra

For Chandra or Moon related problems and during the dasa or antardasa of Moon:

1. Worship the ruling deity Gouri.

2. Recite Annapoorna stotram.

3. Japa of Moon's moola mantra:

"Om shram sreem shraum sah chandraya namah",

10000 times in 40 days.

4. Recite the Chandra stotra:

Dadhi Shankha tushaarabham ksheero darnava sambhavam

Namaami shashinam somam shambhor mukuta bhushanam

5. Charity: Donate cow's milk or rice on Monday.

6. Fasting: On Mondays.

7. Pooja: Devi pooja on Monday.

8. Rudraksha: Wear 2 mukhi Rudraksha.

Kuja(Mangala)

For Kuja or Mars related problems and during the dasa or antardasa of Mars:

1. Worship the ruling deities Kartikeya and Shiva.

2. Recite Kartikeya or Shiva stotra.

3. Japa of the Mars mantra:

" Om kram kreem kroum sah bhaumaya namah ",

 7000 times in 40 days.

4. Recite the Mangala stotra:

Dharani garbha sambhutam vidyut kanti samaprabham

Kumaram shakti hastam tam mangalam pranamamyaham.

5. Charity: Donate Masoor dal( red lentils) on Tuesday.

6. Fasting: On Tuesdays.

7. Pooja: Kartikeya pooja or Rudrabhishekha.

8. Rudraksha: Wear a 3 mukhi Rudraksha.

Mars is also the remover of debts and the giver of wealth. The following is a highly recommended stotra of Mars for this purpose. 

Kuja stotra : 

Angarakoyamaschaiva sarvarogaapahaarakah

Nrishtekargaacha hartaacha sarvadevascha poojitah.

Lohito Lohitaakshascha samagaana Kripaakarah

Dharmatmajah Kujobhoumou bhumido bhuminam

Rakta maalyambaradharam shulashakti gadaadharah

Charbhujo yeshagato varadamcha dharaasutah

Mangalo bhumiputrascha runahartaa dhanapradah

Sthiraasano mahaakaayo sarvakaama phalapradam

Budha

For Budha or Mercury related problems and during his dasa and antardasa:

1. Worship Lord Vishnu.

2. Recite Vishnu sahasranama stotra.

3. Japa of the Budha beeja mantra:

" Om bram breem broum sah budhaya namah" ,

17000 times in 40 days.

4.Recite the Budha stotra:

Priyangu Kalika Shyaamam Roopena Pratimam Budham

Soumyam Soumya gunopetam tam Budham Pranamamyaham.

5. Charity: Donate Udad dal on Wednesday.

6. Fasting: On Wednesdays.

7. Pooja: Vishnu pooja.

8. Wear a 10 mukhi Rudraksha.

Guru

For Guru or Jupiter related problems and during the dasa or antardasa of Guru:

1. Worship Lord Shiva.

2. Recite Sri Rudram.

3. Japa of the Guru beeja mantra:

" Om jhram jhreem jroum sah gurave namah " ,

16000 times in 40 days.

4. Recite the Guru stotra: 

Devanam cha rishinam cha Gurum kaanchan Sannibhaam

Buddhi bhutam Trilokesham tam namaami Brihaspatim.

5. Donate: Saffron or turmeric on thursday.

6. Fasting: On Thrusdays.

7. Pooja: Rudrabhishekam.

8. Wear a 5 mukhi rudraksha.

Shukra

For Shukra or Venus related problems and during the dasa or antardasa of Venus:

1. Worship Durga Devi.

2. Recite Shree Sooktam or Devi stuti or Durga chalisa.

3. Japa of Shukra beeja mantra:

" Om dram dreem droum sah shukraya namah ",

20000 times in 40 days.

4. Recite the Shukra stotra: 

Hima kunda mrinalaabham daityanam paramam gurum

Sarv shastra pravaktaram bhargavem pranamamyaham

5. Donate clothes to a lady on Friday.

6. Fasting: On Fridays.

7. Pooja: Durga Devi pooja.

8. Wear a 6 mukhi Rudraksha.

Sani

For Sani or Saturn related problems and during the dasa or antardasa of Shani:

1. Worship Lord Hanuman or Lord Siva.

2. Recite Hanuman chalisa or any other Hanuman stotra.

3. Japa of Shani mantra:

" Om pram preem proum sah shanaischaraya namah " ,

19000 times in 40 days.

4. Recite the Shani stotra: 

Nelanjan samabhasam ravi putram yamagrajam

Chaaya martand sambhutam tam namami shanaischaram

5. Donate a buffalo or black oil (sesame seeds) on Saturday.

6. Fasting on Fridays.

7. Pooja: Hanuman pooja or Siva Pooja

8. Wear a 14 mukhi Rudraksha.

For all Saturn related troubles the following Shani

Shodasanama stotra of Dasharatha is an excellent remedy. 

Konassanaischaromandah chhayaahridayanandanah

Maargandaja sudhaasouri neelavastraanjanadyutih

Abrahmanah kroora kroora karmaatangi grahanaayakah

Krishnodharmaanujah shantah shushkodara varapradah

Apart from this reciting  the following dasanama stotra of Shani by Dasharatha near a Pepal tree is also a highly recommended one.

Konastha pingalobabhruh

Krishnoroudraantakoyamah

Souri, shanaischaro mandah

Pippaladishu sansthitah

Rahu

For Rahu related problems and during the dasa or antardasa of Rahu:

1. Worship Bhairava or lord Shiva.

2. Recite the Kalabhairav asthakam.

3. Japa of the rahu beeja mantra:

" Om bhram bhreem bhroum sah rahave namah",

 18000 times in 40 days.

4. Recite the Rahu stotra:

Ardha Kaayam maha veryam chandraditya vimardhanam

Simhika garbha sambhutam tam rahum pranamamyaham.

5. Donate: Udad dal or coconut on Saturday.

6. Fasting on Saturdays.

7. Pooja: Bhairav or Shiva or Chandi pooja.

8. Wear An 8 mukhi Rudraksha.

9. One of the best remedies for rahu is reciting the first chapter of Durga Saptasati.

Ketu

For Ketu related problems and during the dasa or antardasa of Ketu:

1. Worship Lord Ganesha.

2. Recite Ganesha Dwadasanama Stotra.

3. Japa of the Ketu beeja mantra:

" Om shram shreem shroum sah ketave namah " ,

7000 times in 40 days.

4. Recite the Ketu stotra:

Palasha pushpa sankaasham taraka graha mastakam

Roudram roudratmakam ghoram tam ketum Pranamamyaham.

5. Donate: A black cow or black mustard seeds on Thursday.

6. Fasting: On Thursdays.

7. Pooja: Ganesh pooja.

8. Wear a 9 mukhi rudraksha.

9. A very good remedy for Ketu is the reciting of Shiva Panchakshari Stotra.