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Make your money work for you
In addition to the other excellent answers here, check out Mr. Money Mustache's site, it's based in the US but the basics still hold here in the UK. Another great site is the Monevator which is UK based and gives some great information on passive investing. Well done on getting to this point at your age - you've got plenty of time for the miracle of compound interest to work for you. EDIT: Once you have any existing debts paid off, take a look at passive/index investing. This could be a good way to make your £150 work for you by capturing the gains of the stock market. Invest it long-term (buy and hold) to make the most of the compound interested effect and over time that money will become something substantial - especially if you can increase payments over time as your income increases. You could also look at reducing your outgoings as recommended on the Mustache site linked above so you can increase your monthly investment amount.