Congratulations on the promotion!
It's a bit of a faff to set up initially, but I have a monthly rota of meals, with a shopping list prepared for each week - I found that it took me too long to decide what to cook each night, so this just means that the internet shop is even easier (esp if you supermarket has the facility to "save lists". Every few months I just add some new meals in. And I have spaces for the Friday night takeaway!
Ironing service is great - we have one that does dry cleaning, and will also do washes as well if you're really pushed (never bothered myself).
Someone to cut the grass.
For other types of shopping, try catalogues (especially if you commute by train). I could pick out a large order of kids basic clothing on the train (underwear, socks, nightwear), and order it on my mobile whilst I was commuting in. Even if you shop online, it is often quicker to look through the paper catalogue first.
It probably is worth looking at some of the decluttering types books/websites. I have found that if things are stored nearest to their main point of use, there is less tidying up to do. Buy multiple copies of items that get a lot of use (eg scissors). Have a stock of cleaning materials upstairs and downstairs, so any messes can be cleaned quickly between cleaner visits (mine just come once a fortnight). Each bed has its spare set in that room, to make changing sheets easier.
Get as much of your admin as possible automated - put everything possible on direct debit or standing order. I buy birthday cards and presents about once every two months and get them written up and ready to post. Contact the Telephone Preference Service and Mailing Preference service to get rid of cold calls and junk mail.
If your children are old enough - delegate! Even little things like having someone else delegated to empty the dishwasher makes a lot of difference.
Hope that you enjoy the new job!