The secret -- the difficulty -- isn't one of having a $100k+ income so much as it is not spending it all. Live like you have a $60k salary, and not only will you still be able to afford a comfortable lifestyle, but you'll also be able to put away tons of cash.
As for actually finding those jobs? If you're willing to do consulting/contracting, ask your friends who are doing consulting/contracting for large companies. They're the ones who are most likely to be in the know about opportunities.
In the US not if your paying taxes :) Make $100k, pay at least $20k to the fed, then whatever else to state, make your bare minimum contribution to your retirement, and you don't have tons of cash left over. Makes $200k and live on $60k, and your going to do alright.
People who live paycheck to paycheck and/or borrow money for personal consumption drive up the cost of living. If your trying to be modest but not live someone in welfare it become instantly evident of how much you need to make. Personally I think you should target to spend about 30% of your income. So, make $100k, live on 30, make $1m live on $300k.
As for actually finding those jobs? If you're willing to do consulting/contracting, ask your friends who are doing consulting/contracting for large companies. They're the ones who are most likely to be in the know about opportunities.