retired

try some pressup pyramids as these can break the boredom in the house eg:
5,10,15,20,25,20,15,10,5
this way you'll get more pressups out of yourself by fooling you into taking tiny breaks inbetween.
if you got a heavy bag try 30 second bursts of continuous punching (breathing out on the right punch).
mix your v-sits (leg raise & touch toes) with crunches (sit up with knee's up to chest then straighten without putting legs on floor), alternate between v-sit then crunches in reps of 20-30.
try pyramid free standing quats/pressups: 10/5, 20/10, 30/15, 40/20, 50/25 eg: 10 deep squats & 5 wide pressups, 20 deep squats & 10 close pressups (tuck elbows in & go right down then lock arms when back up) etc..., again pyramids make you work harder when on own because you think your not doing much BUT THEIR HARD!