Dunno, I'd go with;
1) NOT Triple locked the pensions. It's harsh, but when you are already shrinking the state, you can't then triple lock income for the older folks requiring even more cuts elsewhere. You could even argue it should have been cut (ouch)
2) Not cut local governments as much. Spending is important.
3) As house prices recovered, restrict the amount people can borrow for a mortgage (say to 4x instead of 4.5x). This would have helped cut the average house price, giving more money to renters and first time buyers. (The high average house price is one thing that's stopping our economy from really thriving). Also, take away stamp duty for first time buyers to help first time buyers.
4) Instead of cutting JSA look to fund retraining programs.
5) Instead of raising the Personal Allowance ever higher, provide some Universal Income. (maybe)
6) Reduce the additional tax bracket
Basically... spend on growth. If spending in any areas gives growth, don't cut it.