For example, being present. You can try to be in the 'now' all you want but you will continually be pulled back out of it by your unhealed guilt. So you need to heal that guilt and then you will naturally find yourself in the present without effort. Otherwise you'll be one of these people that is just constantly trying to be present all the time and its a great big effort. You can't be present while you're still attached to an unhealed past.
Another example, you do not have to work at being 'more loving'. To be more loving reinforces the idea that you are not loving enough. You don't need to do that. There's a reason why you think you're not loving/loveable enough and its again got to do with unhealed baggage and faulty perspective. Those are blocks to the *awareness* of love's presence, and those blocks need to be healed and undone.
One the shit is undone, then you are naturally left with an awareness of the presence of love - because IT IS ALREADY THERE. It's not something YOU have to put there, or create, because God has already put it there. And also, realize that just because you are not aware of love does not mean it has gone away, it's just covered up. You are already enough love, even if its hidden from you. So stop trying to be loving and let it be.
Similarly there is not much point trying to be spiritual. That doesn't mean of course you don't have a goal of becoming more aware of your pre-existing spiritual nature, it just means you need more acknowledgment of the spirit that you already are, rather than trying to 'spiritualize' yourself - trying to 'make spiritual'.
Trying to make spiritual is what leads to the spiritual ego, because it reinforces the idea that you are not spiritual. If you're not spiritual, you feel compelled to have to add more spirit. You don't need any more spirit. You ARE spirit. You just need to work on becoming aware of your pre-existing spirit. There's plenty of it already. Don't become more spiritual, because it also makes you un-spiritual, in denial of your existing nature. There's a difference.
This is why the Course doesn't try to teach the meaning of love, but only how to remove the obstacles that make you believe it is not here, or that you are not it. These are all MISTAKES, because a) you are already 100% love, b) you are already 100% spiritual, and c) you are already 100% perfect in God. So you don't need to 'be perfected' or 'become'. You only need to cease the crap that blocks and prevents you from ACKNOWLEDGING what you really are already.
This is all very different than 'adding more' to yourself, or 'attaining' or 'building up' or 'becoming more'. All of those are driven by the ego's idea that you came into existence from some kind of EMPTY VOID, in which you are completely at a loss for love - God having left you in the dirt - so now you have nothing, so now you have to be super-compelled to go seeking for it (where you won't find it). You seek everywhere other than to acknowledge that it was always where God put it, because separation from it has NOT happened. Separation from YOURSELF has not happened, and you are love already. Perfect love. So you have to question the emptiness, it's an ego construct to try to deny that you're already and still as God created you.
So stop the fucking effort of trying to become a better person or better behavior or more spiritual or more loving bla bla bla... you don't need to. And you won't. The more you try to do that the more you will come up empty handed AND create a bunch of bullshit reinforcement in your mind that you're still not good enough. And then you'll be a perfectionist that never is good enough, because you're not willing to UN-DO the false belief that there's not enough love in you already. The idea that you're not already perfectly okay with God is a complete pile of crap.
You're already enough. And you're already you. And God already loves you.