Here's a pattern I've watched over and over. Someone gets a raise, and six months later their account balances look exactly like they did before. Nothing dramatic happened. No big purchase. The new money just blended into checking and got spent, a little at a time, on nothing anyone remembers.
The problem isn't discipline. It's that the new dollars never got jobs. Around here we say every dollar should do work you assigned it, and a raise is the easiest hiring opportunity you'll ever get. You were already living on the old paycheck. For one brief window, the new money is a surplus nobody's counting on. That window closes the first month you let it sit in checking unassigned.
So route it the same week the first bigger paycheck lands. My favorite split is half and half: half the raise goes to lifestyle, because you earned it and pretending you'll bank every penny is a plan that fails by March. The other half gets a standing assignment before you ever see it. Automatic transfer on payday, pointed at whatever's next in your order of operations. Debt, the emergency fund, retirement. Whatever job is currently open.
Notice what the split does. You still feel the raise. Dinner out gets a little easier, and there's no deprivation story to rebel against later. But the half you routed keeps compounding in the background year after year.
One more thing. If you can't say where your current paycheck goes, fix that first, because routing new money onto a leaky map doesn't help much. Start with the leak, then give the raise its assignment.