Just had a brainwave when in Matalan yesterday - tried on a boob tube as a skirt. The 'boob' bit becomes instant bump support, nice and high over bump and you have a cute jersey skirt in hundreds of colours and all for a couple of £ 
Also for tights I just cut straight through the elastic bit of the waistband and stretch it- instantly adds a few extra inches. Not as good as maty tights, but for the first few weeks it made wearing tights a lot more bearable!
Now that it's warmer I just wear hold ups/stockings. No more sweaty crotch or tight waistbands and looks smart for work!
Any other tips/clever ideas you've discovered?