I love really useful tips ....
There is a job I particlarly hate and that is cleaning on top of the kitchen cupboards the bit that gets forgotten in our busy lives. Someone told me this tip once and I use it all the time now.
After you clean the tops of the cupboards while they are still damp lay Cling Film/Saran Wrap over the surface...it is invisible once it drys and when it comes to cleaning just lift it off a quick wipe and a new layer of film/wrap.