- eat out less often (and have friends over more often)
- pack my own lunches (or at least buy cheaper ones)
- let “the cheaper option” be the deciding factor a bit more often
- review my mobile phone provider and tariff
- consider selling my old junk on ebay / amazon
- look into alternatives to gym membership
There’s quite a good list of saving tips here:
http://www.thisismoney.co.uk/50ways
