If you worry that your readers won’t like the fact that you’re making money, I encourage you to shift your paradigm on this a bit. If someone provided valuable information to you, wouldn’t it be nice to reward them a bit? Maybe they taught you something. Maybe they saved you time for not having to search for the information themselves. Maybe they showed you some great uses for a product you were considering buying anyway. Whatever the case, if you’re providing affiliate links in an ethical way, no one should fault you for it.
The products and services you will be promoting to your audience must be relevant and good quality. Make sure you believe in them and know everything about them, because this will be crucial to you delivering the sales pitch to your audience. You need to build trust with your audience so make sure the products and services you choose to promote are trustworthy enough.