That's absolutely right dothackzero, just desire them. Hopefully that desire for the gifts is out of a desire and hunger for the gift-giver and desire of a greater awareness and closeness of His presence.
You know that desire comes from God, period.
Don't worry so much about your motives, whether they are selfish or not, or waiting for your "heart to be right" as a previous poster said (good advice, but sometimes can do more harm than good if we're always worrying about if our heart is right and keep us self-focussed rather than God-focussed). As far as I'm aware, God gave us the gift of the Holy Spirit when our hearts were still sick with sin and were not right. We don't have to be perfect to receive God's gifts - that's why they're called gifts and not rewards.
Anyway it's pretty much impossible to have selfish motives when we're seeking God for His gifts. A selfish motive for supernatural power is what drives pagans and they think it all comes from themselves or mother earth or whatever. Christians don't do that, we seek God. And when I got the gift I prayed in tongues a lot. And well if it's selfish to pray a lot then so be it, I was selfish. Some Christians think you have to be out on the mission fields or something 24/7 and always doing something for others, but that's why there's plenty of burnt out pastors who can only spare 5 minutes a night in prayer at best. It's ok to be a bit selfish for the things of God it's a lot better than not seeking God at all. Thank God you aren't seeking after drugs or fast women (hopefully
) instead but are desiring the things of God. That puts you a cut above the rest. Besides, it's not like winning the lotto, that will impress all your friends and give you a halo on your head. It won't really impress anyone, if anything, sometimes you have to put up with other christians or churches and non-christians who are strongly anti-tongues and will ridicule and make fun of you, just like they did at Pentecost saying they were all drunk.
I know that books I've read on tongues and the gifts usually have on the last page "just pray this simple prayer to God and mean it with your heart..." and it's "supposed" to come easy and whiz bang it's all supposed to happen , and I guess it should be that simple but in my experience it wasn't. For myself it took about 3 years of wishing, hoping, asking, begging, pleading, with God to be baptised in the Spirit and speak in tongues until eventually I was. Hopefully it will come quicker for you, but the moral of the story is - don't give up your quest.