Gambling is entertainment that costs money. It is not income, it is not a way out of a shortfall, and no strategy on any site changes the arithmetic of a house edge. The single most useful thing on this page is the advice to set a deposit limit in the cashier before your first deposit rather than after.
Warning signs worth taking seriously: gambling with money set aside for something else; chasing a loss with a larger stake; hiding how much you play from people close to you; borrowing to play; feeling you have to keep going to get back to even; or finding that the only thing that lifts a bad mood is a deposit.
Tools every operator here provides. Deposit limits, loss limits, session reminders, cooling-off periods and self-exclusion. They sit in the account or cashier settings. Limits take effect immediately when lowered and are deliberately slow to raise — that delay is the point of them.
Free, confidential help in Canada. ConnexOntario — 1-866-531-2600, 24 hours, for Ontario. Elsewhere: the Alberta Problem Gambling Helpline on 1-866-332-2322, BC's Problem Gambling Help Line on 1-888-795-6111, Manitoba on 1-800-463-1554, and Quebec's Jeu: aide et référence on 1-800-461-0140. The Canadian Centre on Substance Use and Addiction maintains a national list.
If you are worried about somebody else, the same helplines take calls from family members and will talk to you about what helps and what does not. You do not need the person's permission to ask for advice.
This site is 19+ (18+ in Alberta, Manitoba and Quebec). If gambling has stopped being fun, stop — the sites will still be there, and so will your money.