Training running 4 miles in every week.. before every run do worm up soccer workout. Do squats, push ups, sit upps.
I Recommend, do Butt kicking workout, Plank, jump rope, ànd high knee pulls..
If you want to improve your condition and your skills purely for soccer i would suggest you focus on working out with the ball.
The main skill in football is technique and the only way to improve your technique is ALOT of touching the ball.
One simple routine which is great for conditioning work and technique is the following.
Get 10 poles/sticks or whatever and place them behind eachother at something like 50 cm. The exersise should be done at a high pace with a short rest in the middle. Dribble between the poles on the highest pace possible while keeping control of the bal. Use the inside AND outside of your foot to keep control. Touche the ball as many times as possible while dribbling and try to make short steps. When comming at the end turn sharply to right or left and pass the ball to the beginning on one motion. Sprint behind the ball and control it. Repeat this atleast 15 times with max 1 short break.
What these kind of exersise do is forcing you to keep control of the ball at a high pace in an environment where their is pressure on possesion.
There are alot more of these kind of things. If i were you i would go on youtube and check for technique training clips and see what you like to get into your own training.
I dont really believe in long distance runs as the best base for football condition. But maybe that is cuz im dutch and we always train on technique above everything. If you were to train condition i would mainly train explosiv sprint at a high pace and incorperate the ball if possible