A structural fix is something that you pay for up-front and which then continues to serve your life with zero or little in the way of ongoing maintenance costs.
Some examples, feel free to add more:
-If your computer is swapping (you hear the hard drive churning) during normal usage, get more RAM! Getting an SSD hard drive is also a good idea. Swapping out to disk is like sending a sailboat across the Atlantic to fetch your stuff, whereas RAM is like getting it from your pocket.
-Buy everything you can find that can optimize your sleep. Some ideas: blackout curtains for your sleeping quarters, Zeo device, supplements known to aid sleep (melatonin, zinc, stuff like that), Philips Golite, earthing mat, etc.
-Get a good digital scale with bodyfat measurements and all that jazz. Make a habit to enter it into a suitable tracking tool. Hacker's Diet is good for weight. Even better if it auto-tracks the data for you.
-Truecrypt is a security tool which can on-the-fly encrypt your entire hard drive. Instant security fix.
-Use RescueTime and similar applications to enforce less procrastination.
-Get a kettlebell for your bedroom, office, car, etc. They can be used for all kinds of spontaneous exercise. Which adds up over time. Other alternative: exercise bands.
-Make a list of your favorite healthy recipes and keep in your Dropbox. Helps a lot with diet adherence.
-Get a pedometer (foot step counter), or install a suitable app on your smartphone. Measuring this is likely to increase how much you walk during the day.
-Get a workout buddy. Increases show-up rate a LOT.
-Get several different gym cards, if you can afford it. If you don't feel like going to one of them, maybe you feel like going to another. One day you may want the hardcore powerlifter gym, the next day you need a more relaxed ambience. I personally have 1 gym membership, but use an a la carte approach, ie I go to different gyms and get a one-time ticket.
-If you can afford it, get a cleaning lady (or a Roomba).
-If you get an expensive haircut, take photos from all angles. A cheaper hairdresser may be able to replicate it later.
-Go see someone with a lot of anatomic knowledge (physio, Active Release Therapist, Rolfer, Graston practitioner, Feldenkrais, etc) and have your muscular imbalances corrected.
-Spotify Premium is well worth the money. Access to almost all music on all your devices. Saves a lot of time for me. Same with Netflix, Amazon Prime, Audible, and things like that.
-Whenever possible, get private tutors and coaching. You'll learn much much faster than on your own.