Sajda-e-Sahw

Q: After every single namaaz can I do sajdah twice then make salaam and count it as sajdah sahw. I feel like my namaz isn't perfect that's why I do short sajdah sahw after every namaz.

Q: In almost every salah I tend to think that I skipped something that I need to do sajda sahw for, but I believe it is not correct everytime. No matter how much I tend to focus and not do sajda sahw, I think that I skipped this out or that. What is the ruling in such a case?

Q: I was performing two rakaats of salaah, and when I stood up for the second rakaat, I began reciting attahiyyaat by mistake. As soon as I realized, I stoped reciting attahiyyaat and started reciting Surah Faatihah. Is my salah valid?

Q: What should I do if I pray 3 rakaats instead of 4 rakaats mistakenly?

Q: If in salaah I did not recite a surah in the 3rd rakaat of the 4 Sunnah, do I make an extra rakaat as qadah?

Q: I made the intention in my heart to recite long surahs in fajr salaah, but I forgot and recited short surahs instead. Does this make sejdah sahw waajib?

Q: I did not sit for qa'dah in the third rakaat of Magrib and I went straight into a fourth rakaat. I completed the rakaat and then made Sajdah Sahw. I was a munfarid. What is the status of the salaah?

Q: I have few questions regarding my doubts and sajdah-e-sahw

1. If I performed sajdah e sahw already and then I recited attahiyaat again and committed mistake in the second part of the shahada i.e. (wa ash hadu anna Muhammadan abduhu wa rasooluh) but not corrected and go to durood shareef and while reciting durood remember that I committed mistake in shahada so I just recited the second part of the shahada again and then recited the durood again, is it permissible to recite the mistaken part only or do I have to recite the full shahada again once I reach durood shareef ?

2. If I repeat any ayat of Surah Faatiha, not the full surah or any part of attahiyaat and not the full attahiyaat, does sajda e sahw become wajib or not?

Q: If one is performing 2 rakaats sunnats of fajr or isha, and he stands up after reciting tashahud in qaidah forgetfully for the 3rd rakaah, what should he do and recite when he sits back down in qaidah?

Q: If I wanted to read 2 rakat of nafl salaah but after reading 2 rakats, without sitting, I get up accidentally, should I break my salah? If I sit for tashahud but forget doing salam and get up accidentally what should I do?