play the cowboy man, this is the only skin you can carry with

for real tho:
1.) try and play aggressive early if you have ignite because people really underestimate his damage early on and you can easily get first blood and snowball.
2.) try and clear some of the minions so you dont take minion damage as much and than e through them, e your opponent, get a couple qs and autos off and e back through the minions. If you do this fast enough your shield will absorb most of the damage your opponent does and you will win the trade.
3.) repeat until they are low enough and then all in them for the kill.

get a nice little q q e q (knockup) auto r q auto q auto auto q auto
practice this and you will become the master of the sword man and be 1v5ing in literally no time

IF YOU HAVE A KNOCKUP try and ult the squishier champions. You should have IE probably around this time and will shred squishes like paper. hence the name the paper shredder. If you take damage windwall and if they are close enough kite them around the windwall.

everyime you make a decently cool play, even if it wasnt that hard, spam that mastery emote and always play like you can 1v1 ANYONE.

gg, hit /d and mastery emote for maximum yasuo epicness