G'day Vera. I wish I did have a few winning mantras. The only thing I can recommend, is that people take a look at dividend paying stocks. (Especially the older we get. LOL)
There are a couple on the Toronto exchange paying around 20% yield. I've been buying TUI.UN and it has been reliable for awhile. It's been down with the recent price of oil, but it just makes them easier to buy. It pays dividends monthly, so if you re-invest it's actualy much more than 20% annually.
But this is just my own strategy and may not be suitable for frequent traders. Good luck to ya!