It's almost laughable what Jesus says.
...Can you imagine a dad giving his child a rock, when he asks for food?! Or a snake when he asks for a meal?? Of course not! No good father would do that to their child!
And if no earthly father would do that, it's absurd to think our heavenly Father would! Jesus tells us that God is a better Father than any other we could imagine on Earth -- how much greater the gifts He desires to lavish on us!
So, how do we get these gifts?
Jesus answers this resoundingly: ask Him!
He invites us over and over again to come to Him with our requests. He is a good, good Father who cares about us and hears us when we pray. More than that, He promises to answer our prayers and provide for us.
Does this mean that God gives us whatever we want?
No, of course not. He knows what's best for us and acts accordingly. Just like a parent having to tell their child "no" in the toy store, there are going to be times when God knows it's best for us not to always have the thing that we are asking for.
But, He still wants us to ask! Prayer is important and powerful. It's our direct link to our Creator in Heaven, the author of the Universe who loves us and wants a relationship with us. Prayer connects us with Him and aligns our hearts to His.
If you want something (no matter how trivial), ask Him. He is never going to be annoyed because you asked! He is a kind, caring, compassionate Father who loves to give good gifts to His children. So, bring all things to Him! He desires that.
The Golden Rule
In verse 12, Jesus sums everything we have learned so far in the Sermon on the Mount (and beyond!) up in a tidy bow: "So whatever you wish that others would do to you, do also to them, for this is the Law and the Prophets."
Jesus sets our example for this. When He was pressed, what came out of Jesus was not anger or frustration, but love, compassion, kindness, and mercy.
In Him, we have the freedom to love others radically and without expectation. We are free to go into the world and love our neighbors the same way He treated us.
Romans 5:8 says it best, "but God shows his love for us in that while we were still sinners, Christ died for us."
That is who our Father is.