Firstly, I'd like to say you'd be better off speaking to a financial adviser for financial advice than ask on a window lickers forum
Personally, I think you should have a wide portfolio of investments (not savings!!), you want your money to grow.
So stocks and shares. Good long term "boring" utility stocks (there is always going to be a demand for these companies products and services), that pays a good dividend and steadily grows through the years.
If you know what you are doing with sharing trading, its probably the lest hassle way of getting rich.
Physical Gold bullion bars and gold coins. British gold coins are capital gains tax free and you pay no VAT on gold. Look at the gold charts for the last 40 years, they are not making anymore gold! there is always going to be a demand for solid gold especially from emerging nations like the middle east, India and China. Having about 10% - 20% of your portfolio in gold (physical not a gold stock), would be a very shrewd move imo.
Property. This is a pain in the arris as has been said already. But the cold hard truth is that I know a ton of property millionaires than any other sector, business or other wise. The trick is to have more than one property rented out.
Always buy in a good location, if its cheap chances are its crap, remember your investing money so only buy in the best locations. Do you have a university in your town? In Edinburgh there are 3 - 4 bed flats that rent out for £1400 - £2000 pcm. And that's not taking in to account the growth of the property.
Sure you will get the odd dodgy tenant now and again but put them on a 6 monthly agreement/contract, take a 75% deposit (for any damages), get two forms of reference (ideally from previous landlords or letting agents), furnish the flat with minimum IKEA furniture and find excuses to check up on them occasionally. That's what I do
whats the worst that can happen? Your not furnishing the flat with plasma TVs! Stories of tenants setting up a cannabis farm in your property or knocking down internal walls is a load of old cods walop.
Property tip: Are there any new estates being built in your area? Still at the planning stages? Do you know you can buy property from the architects / house builders plans at vastly reduced cost. (of course it is harder to get a mortgage for these types of property purchase) You wait till they are built and flip it! Sell it as soon as the door handles have been screwed on and make a very easy £20k - £30k or more without doing anything!
Here's another tip: look into the Shale energy industry and companies that are set to profit big time from mining/processing/servicing it. Its going to explode in a few years to come, taking over the Oil industry.
All these hippy protestors need to get a reality check and shut the hell up. They have no idea what they are banging on about! Britain has some of the worlds largest shale gas reserves. There's a lot of money to be made for the savvy investor.