how do you higher your chances to win?

not

Sacrificing your firstborn.

I personally create a fake private giveaway, enter it, and win. 100% guaranteed win.

You don't

Send me naked pictures of any fit burds you know.

You don't. The more you know!

You don't.

You worship satan backwards

You have to mail the moderators each a handwritten love letter proclaiming our amazing talents to the world, a gift of Fortix and a box of chocolates. The last one is why I need a diet.

Winners are chosen randomly, so you don't. People who believe in karma tend to make giveaways thus believing that they have now higher chances of winning something back.

Only way is to enter giveaways with less people joining.

Every giveaway you lose, you make a thread about it. Stay as close as one thread per giveaway as you can, and when the RANDOM NUMBER GENERATOR PLANETS ALIGN, you make another fucking retarded thread.

Next please.

send an empty beer can to the 2k games studio ;]

group giveaways. search steam groups for giveaway or gifts..

Get to GrandMaster League in SC2.

just kill every other guy who enter to the give-away... or donate a HOT DAMN LOT of money to the site...

Step 1: Learn english

Magnets, true story!

checks user profile before clicking thread

not surprised.

Well kinda can make giveaways then enter high contributor giveaways alot better chance other than that nothing.

You must use The Force.

Give away games that are free, but you already done that.

you need to improve your grammar first

Alright, serious answer: The RNG is completely unbiased, meaning the only way to improve your chances of winning is to enter for giveaways with less entries. There are a few ways to do that:
1.) Contributor giveaways - The more you donate, the more value your account has. The more value your account has, the more contributor-only giveaways you can enter. The higher the barrier for the contributor giveaway, the less people will enter. SCIENCE
2.) Group giveaways - Join public groups - like the Steam Gifts group, The Streaminators, etc. - to enter group-only giveaways for them, which have less entries by default.
3.) Chat giveaways - Often in SG-related groups' chats, you'll see people toss around private giveaway links for chat only. These often have <50 entries, meaning you have a much higher chance of winning here. However, it's usually frowned upon to join chats for nothing more than the giveaways, so try to be active in any chats you're in.
4.) Forum giveaways - Sometimes, users will put private giveaway links on the forums, or even have a puzzle to get to a giveaway. The harder it is to find the giveaway, the less people will enter.
5.) GRAMMAR, DAGNABBIT

Doing barrel rolls, lots of them