There are as many answers to your question as there are children - even my two were entirely different. Look at the various questions we have had on the subject to get some ideas, certainly; this one, this one, etc. The sleep tag is full of good answers.
In your specific case, I would look at a couple of possibilities. Has something physically changed? Maybe she's outgrown her current pajamas and they're too tight? Maybe she is getting too warm in the swaddling blanket, or as Dan noted in the comments, needs swaddling? Maybe she's a very early teether, or has some low grade infection (does she have a fever?). Lots of small possibilities.
It's also possible that it's none of the above; she's just in a stage. Sorry about that, but we all have gone through them - my almost three year old is going through one now, he wakes up most nights with a nightmare. Thanks, growing imagination and mental capacities. It happens, and sometimes you just can't fix it.
If it's too much for you, consider working things out with your SO where one of you sleeps all night somewhere else - downstairs, at a friend's or relative's house, etc. - alternate nights, or even better, swap after 2 or 3 nights (one night often isn't enough).
Also consider a sleep specialist. A friend of mine had great success with one; she came over, helped teach the parents how to get their baby to sleep, and also helped teach the baby how to go to sleep - and largely their problems went away after a few more days, although who knows if this was a placebo effect or not. Still, they were a big fan, and if nothing else they had someone to take care of the overnights for a few nights. You could even hire a babysitter for the night as needed.
Do pay attention to your needs, though, as it's likely to spill over to the baby (especially if she's nursing - stress hormones seem to go through).