Hi Harry, Property is a people business. You'll be liaising with a number of people throughout your travels - Agents, Brokers, Investors, Lenders, Tenants, Tradesmen, Builders, maybe even Partners. My best tip for you is that you need to be a likeable personality and its vital that you 'do what you say you're going to do'.
I agree with Nick that educating yourself, using reputable sources before you part with substantial funds is the first part. Second is finding an experienced mentor that you can learn from who will help you identify any potential pitfalls (you're first one is always the hardest one!). Third is to build a network of reliable people who can help you source property and introduce you to more people within the industry, and lastly, its important to take a medium-long term view!
I do recommend Nick highly as a mentor as he has done very well in property and has probably made all of the mistakes that most will go through themselves - he will save you time and money without doubt.