Look upon finding a job as a numbers game - this is what I did after redundancy - that way I didn't feel rejected when companies didn't ring back etc.
Start with your CV - get a friend to read it over and make it as perfect as you can.
Then hit the online job boards - make sure you CV is searchable on as many as you can find. Ensure your CV has a mobile number on it, even if it's just a £10 payg from tescos.
Next spend a couple of hours every single day applying for as many roles as you can see on the online jobs boards. Include roles beyond what you've done before but that are related & you know you can do e.g if you've done retail, think about applying for evening and weekend bar work, even part time so long as your partner can watch the kids at these times. Chains especially recruit from within so a part time role can easily become a junior management role at another branch in a few months.
Set yourself the target of 100 applications a week. From those expect 5 call backs, from those 1-3 interviews.
If you get an interview do not stop applying for other roles as part of your daily routine until you have it in writing that you have a bone fide job. Don't be scared to ask for help from friends/job centre with interview practice and look upon each interview as the dress rehearsal to the "real one" to stop nerves getting the better of you.
Rinse and repeat the above process until your number comes up. If you've been seriously looking for 6 months you are due a break soon, it's just holding your nerve till it finally arrives for you.
Treating it as a pure numbers game helps ward off the stress and fear of it all imploding on you financially, and means you avoid giving the impression of anxious desperation that can wreck an interview. It's just a mental trick to help you keep your cool, nothing more.
I'm sure others will be along soon with their anxiety avoidance techniques.