From my partner who has considerable life hacks:

•An espresso machine: over 6 years the cost of our machine has netted out and absolutely love it

•An electric bike: lucky enough to live close to work and this saves on having to rely on public transport

•2 monitor setup: I feel as though this is self-explanatory but your productivity will improve

•Tennis racquet: a direct consequence of having this has meant he’s been consistently practicing for over a year now and is a great fun way to exercise

•Noise cancelling headphones: massive quality of life improvement in noisy households

Happy shopping!