Probably the best thing you could do poppy1 is to start a spending diary (and confirm the "I thinks"!). You appear to be sensibly in control of your spending but if you feel that there maybe savings to be made the easiest way to identify them is to firstly closely examine your outgoings. Start with an outline budget to give you an initial cash position for the week and then record every penny spent, whether it is a newspaper, a carton of milk, a euro to a charity, a weekly shop or money to savings. Treat all outgoings the same. Do this for probably two or three months and this will give you a clearer picture of what you are spending money on. Examine and challenge every spend no matter how trivial and decide whether it is money that you need to part with for that purpose.
Once you have a clear idea of your spend start looking at a more comprehensive budget including savings as the first item in the budget rather than the last. Look at giving yourselves each a daily allowance to cover your costs for the day and look at ways for differentiating between your different savings streams. Savings should not be looked at as a lump, you should be saving for different things in different ways. For example, there should be a savings cushion for emergencies that is accessible but ring-fenced for genuine emergencies. This should be a target amount that you maintain (preferably a multiple of your monthly take home pay). There should be easy-access short-term savings to cover annual expenses (Christmas, holidays, big annual bills, weddings etc) - not to be confused with your emergency savings. There should be medium-term and long-term savings to cover expenses that come up less regularly (cars, houses, retirement), these should be relatively inaccessible - this will allow you (generally) to avail of better rates of return.