Its an open age team and i'm getting about 16 players coming to training every week. Basically, I want to get the lads as fit as possible because i think at sunday league level fitness can win you alot of games.

Hi, just new here. Looking to get some drills myself, but here's a couple i use....hard work but the lads seem to enjoy them.

1) I seen this one used by the late great Jock Stein with the Lisbon Lions, simple and I was delighted how it went!
You(the trainer) walks and the players follow you in a queue, the first player behind you lies on his face(opposite way you are walking ie you --> - | <--Player) and the next player jumps over him and lies on his face, this repeats until all the players are over and on their face, then the last player gets up and jumps over all players until he gets to you, then he goes down and it repeats until the you decide.
Variations are that the second player crouches down rather than lies, meaning players have to jump higher. Also you could make the players have to slap your hand.
The players are up and down as well as running.

2) Place 4 cones in a box shape, a fair amount of distance between them and get the players to run round the cones. Inside the box place bibs on the floor, about 2 less than the players you have. As they run round, shout out instructions ie left, right, head...then once you shout bib, they all try to get bibs. The players without bibs have to carry out a "punishment". My boys always have a laugh. Decrease the amount of bibs each time.

light hearted hey ok here is one.

We use alot of this type in our kids stuff but ocasionaly i whisk it away to the sniors too to just "bring em back to earth" or have some quick fun.
4 cones form a square (spread em out for seniors
dump lots of balls in the centre
players start in their homes, corners behind the cones. (you can also place cones along the sides to make more "homes".
the idea is simple. collect as many balls as possible to your home. you can take them from others homes, or from the centre. you cant tackle, you cant defend the balls at your home.
for the seniors I allow them to attempt the dribbling of as many balls as they like which always results in a fiasco but they still try it
I let em at it for a while then give them a count down and blow the whistle. the one with the most balls at his home wins.

works on dribbling skills, awareness, forces constant decision making and route planning , reflex thinking, aviodance of others, relieves the pressure of tackling and quick passing. heaps of fun