1) Most brokers have a minimum deposit of 200 USD (or other major currencies like the Euro or the British Pound). There are brokers who may require higher first time deposits of $500 or even $1,000 and you can also find brokers accepting smaller deposits of only $100, but they are very few.
2) All brokers offer the most popular assets: currencies (also known as forex pairs), major stocks (the likes of Google, Apple, Microsoft or Exxon Mobile), metals and commodities (gold, silver, sugar, oil, coffee or corn) and stock indices (the Dow, Nasdaq, FTSE and more). However, the asset offer differs from one provider to another when it comes to more exotic pairs or less popular stocks and commodities.
3) Payouts are usually at the same levels but not always the same. Some brokers offer higher payout rates than others while some prefer to give lower payouts for winning trades but refund up to 10% on losing positions. A wise thing would be to register accounts with two or three brokers and trade each asset with the broker giving better payouts for that particular equity. For example you may find an 85% payout for Apple and 80% payout for Gold at one provider, while another gives 80% for Apple and 85% for gold. Why not take advantage of the best of both worlds?
4) It is always a good idea to diversify. Never put all your eggs in a single nest. One trade should never exceed 10% of your bankroll no matter how predictable the outcome of the trade might look like. You should also consider spreading your bankroll among several brokers if you have a bigger amount to invest. Why keep $2,000 with a single broker when you can have $500 at four different providers? You will be able to take advantages of all the benefits they offer including higher payouts, bonuses, asset diversity, different trading platforms and special options.
5) Trading binary options should be fun. Don't trade for the sake of it, or with the only purpose of winning money. Enjoy the ride and even when you lose see the bright side of the picture: you had some fun! Never trade if you are stressed, nervous or tired. Binary options trading can be extremely enjoyable if you do it the right way. Short term options like the famous "60 seconds" can be used to increase the fun when with friends, just like betting on stuff. If somehow your trading session becomes frustrating because of some unlucky runs, you should take a break and resume when you are in a better mood.
6) Don't use your retirement money for binary options trading. This kind of trading is not a long term investment and shouldn't be treated like one. What you put in is at risk. Trading binaries has nothing in common with savings, retirement accounts, wealth appreciation or investments in general. If you want to invest high amounts of money you should seek the council of a professional money manager or financial advisor.