Don’t overlook the psychological aspect of being made redundant (if it happens). I got made redundant at a day’s notice just under two years ago when the company I’d been at for nearly 12 years went under, and dealing with the mental aspect was really hard.
If it does happen and you don’t have anything to go to, treat looking for a new job as a job in itself – work regular hours, be accountable for your time to someone, keep written records of everything you’re doing, etc. Contact every agency with even the slightest link to your field of interest. Follow up every emailed CV/profile to agencies with a phone call a couple of hours later to chat to them about it – I found this really helps them to see you as a person rather than just a paper/online application.
Follow up every lead, chase everything, look in local papers, Gumtree, all the job websites, etc. Tailor your CV and covering letters for the positions applied for. I found my current job after my OH told me to cycle to all the industrial estates within easy cycling distance, write down the names of any companies that sounded interesting and look on their website or phone them to see if they had any vacancies!
In the age of emails an anonymous contact, telephone calls or even face-to-face meetings will make you stand out and memorable.
Be prepared to accept something that isn’t perfect if you need to keep your head above water (as I did) – you don’t necessarily need to stay there long-term. I went through three jobs in the space of a year after my redundancy before finding something I was happy to stick with.
Good luck, keep your chin up, and if it happens, see it as an opportunity not an obstacle. :)