Perhaps take some time to think about the type of job that would make you happy, if you have the skills now or need to re-train and what sort of salary you need to meet your needs?
Work out an annual budget, if you don't have one already, so you don't waste time applying for a job that won't meet your financial requirements. Some things you may wish to include are e.g. monthly mortgage / rent, supermarket costs, transport costs, insurance (house and contents, health, travel), communication (landline rental, wifi / tv package, mobile costs etc), holiday pot, family costs (e.g. school uniforms, school trips etc), savings safety net. Now you know what you need, as a minimum to get by each year.
You can then narrow down your search field by considering:
- Would you like a job inside (e.g. shop, office) or outside (e.g. gardener, dog walker)?
- Do you need to stay local / work near public transport or car parking?
- Would you like to work full time or part time? Are there only specific hours / days you can work (e.g. term time only)?
- Would you like to work around other people, or prefer to work alone / with a small number of people?
Once you've narrowed down your options, have a look at some job adverts in the field you want to focus on to find out if there is a general base level of skills required. If you don't have the exact skills now, look at where you can get further training and what the potential cost will be. (e.g. local adult education centre - your council website will have details, University, short courses available online etc. For fields like accountancy, the firm will often pay for your studies.)
So, let's say you need an annual salary of £20,000, you can work full time and you'd rather work in an office environment, around other people. From what you've said, you have great sales experience, combined with qualifications in business administration. You could try looking for office jobs on reed.co.uk, linkedIn, workingmums.co.uk etc. Alternatively, a lot of large firms now have 'return to work' schemes for mothers who have been out of the work force for a while, raising children. Best of luck!