shrink yourself or grow your net worth

I'd be willing to bet that at some time in most people's lives they have set out to accomplish one or both of the following:
Lose Weight, Eat Better, & Get Healthier (Shrink Yourself)
Save More Money & Invest It For The Future (Grow Your Net Worth)

These two popular 'worthy' pursuits of self improvement don't actually have a lot in common. OK, they both require discipline, but the similarities end there.

• Saving Money and Investing it is Passive

Spending less money takes less effort than spending more money. It might be a lot of work to figure out different ways to trim your budget, but buying a house well below your bank pre-approval amount, and avoiding large frivolous purchases is easy. One of the keys of investing for the long term is sitting on your hands. Tinkering with a portfolio and trading in and out of different stocks and different instruments will often take a large percentage out of your return. Spend less than you earn, invest the difference, and ignore it for several years...no sweat.

• Working Out Regularly and Choosing Healthier Foods is as Active As It Gets

Getting active and/or getting to the gym regularly takes a great deal of effort. Sticking to a workout regimen is very difficult. Changing your diet in order to take in less calories and more healthy foods takes some thought, adjustment, and effort. Lot's of sweat and activity here...

If you are reading this blog you might find the former much easier than the latter, as I do, but is it really easier to most? How do personality types and values affect one's successes in these areas?