Uttanka.
If you REALLY want to dive down the Najdorf rabbit hole, I recommend chessbase' DVD on the Najdorf by Daniel King. He makes it easier and more enjoyable to absorb the plethera of all the lines. It's more expensive than a book (most likely) but very reasonably priced. This is how I start to learn openings now.
If you don't want a book, you may as well just study database games. (You should do that anyhow).
Ideas... Hmmmm.
Bg5 variaton. If white "actually" knows the theory then you use the browne system with h6 and Ne5. But I find white never plays the full line properly.
Be2 variation is subtle and can sometimes transpose to the english attack. Then it depends if white castles kingside or queenside. Then your plans change. It also depends on whether white pushes f4 or or g4 and depending there are sub variations.
Be3 is the english attack as I mentioned and then it 'depends.'
Fischer Sozin. Play a Schevenigin with e6 and always look for sacs on that square.
There are general ideas of b5, d5 and play on the c-file depending. But you have to know a lot of variations/theory and know the move orders.
thanks