Lump-sum once annually, spread between 2-3 stocks. I prefer that way so as to keep me seated and focussing on other issues as I give my shares rooms to move around, but the key challenge is entry, picking the right stocks, people interested in the stock market need to at least learn the basics of analysing share prices, be it technical or fundamentals, it's not hard.
In every game and con there is always a victim and there is always an opponent. It’s good to know when you are the former so you can become the latter.