I’ve been there, and yeah, your work pattern totally affects how you handle invoices.
Here’s what worked for me:
I set up ‘Money Mondays.’ Every Monday morning, I deal with all money stuff - sending invoices, following up on late payments, and checking my cash flow.
It’s not perfect, but it’s way better than before. I used to forget about invoices when I got busy with projects. Now, even if I’m swamped, I know Monday morning is for money.
Another thing that helped was setting up auto-reminders in my calendar. I get a ping if an invoice is unpaid after 2 weeks, then again at 30 days.
Just remember, whatever system you pick, be consistent. It took me a while to get into the habit, but now it’s just part of my routine.